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Advances in Interventional Cardiology/Postępy w Kardiologii Interwencyjnej
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vol. 15
 
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Original paper

Current trends and procedural outcomes in the era of rotational atherectomy expansion in Poland in the period 2014–2017 (based on the nationwide ORPKI registry)

Rafał Januszek
1
,
Zbigniew Siudak
2
,
Krzysztof Reczuch
3
,
Sławomir Dobrzycki
4
,
Maciej Lesiak
5
,
Jacek Legutko
6
,
Paweł Kleczyński
1
,
Łukasz Rzeszutko
1
,
Dariusz Dudek
6
,
Stanisław Bartuś
7

  1. 2nd Department of Cardiology, University Hospital, Krakow, Poland
  2. Department of Internal Medicine, Faculty of Medicine and Health Sciences, Jan Kochanowski University, Kielce, Poland
  3. Department of Cardiology, 4th Military Hospital, Wroclaw, Poland
  4. Department of Invasive Cardiology, State Teaching Hospital, Medical University of Bialystok, Bialystok, Poland
  5. First Department of Cardiology, Poznan University of Medical Sciences, Poznan, Poland
  6. Department of Interventional Cardiology, Jagiellonian University Medical College, Krakow, Poland
  7. 2nd Department of Cardiology, Jagiellonian University Medical College, Krakow, Poland
Adv Interv Cardiol 2019; 15, 2 (56): 158–166
Online publish date: 2019/01/18
Article file
- current trends.pdf  [0.26 MB]
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Summary

The availability of rotational atherectomy (RA) has increased recently in Poland, which was followed by an increase in the rate of RA procedures and catheterization laboratories (CathLabs) performing. We observed an above threefold increase in the number of RA procedures from 181 in 2014 (0.19%) to 698 in 2017 (0.61%) and an above two fold increase in the number of CathLabs performing RA from 25 (15.5%) in 2014 to 55 (34.1%) in 2017. Apart from the increase the number of RA procedures and CathLabs performing RA, its procedural effectiveness remains at a stable level.

Introduction

The improvement of diagnostics and treatment methods in interventional cardiology among well-developed countries leads to an increase in the number of patients with more advanced atherosclerosis and disseminated calcified lesions as potential candidates for percutaneous coronary interventions (PCIs) [1]. The PCI with rotational atherectomy (RA) could be an option for percutaneous treatment of complex and calcified coronary artery disease. Nowadays, due to an increase in overall experience and availability of RA, patients are more often being transferred from cardiac bypass surgery to PCI and treatment with PCI, and RA could serve as a bridge between PCI and cardiac surgery in selected patients [2]. From a different point of view, it can be said that RA use could serve as a filter for patients with multivessel disease having severely calcified coronary artery stenoses, being potentially complex cases for cardiac surgery. Due to the fact that the reimbursement policy has changed in Poland in recent years, we can observe an increase in the rate of RA procedures and a gradual increase in the number of new catheterization laboratories all over the country [3]. It may be suspected that the currently visible decentralization of well-experienced centers in RA procedures could result in a change of procedure quality. The present European consensus on RA advises that optimal outcomes for the RA procedure are achieved by regular usage of this technology [4]. It is also suggested that it might be safer to consider transferring a patient to a high-volume center which is well experienced in this procedure [4]. Additionally, it is advised that potential rotablator operators could benefit from training at high-volume centers [4]. Moreover, in some countries, physicians intending to perform the RA procedure have to pass a certification course under supervision, which should be signed off by the RA training directorate [4]. However, the above-mentioned guidelines do not precisely indicate the number of annual RA procedures which have to be performed by a particular catheterization laboratory to be recognized as a high-volume center as well as the annual number of procedures to be performed by an experienced RA operator.

Aim

The aim of the present study was to assess current trends related to RA procedures in Poland at the time of its rapid growth and while the number of new low-volume centers is constantly increasing.

Material and methods

Study population, design and definitions

Data from all patients who underwent PCI in Poland between January 2014 and December 2017 were analyzed. Prospectively collected data on PCI practice in Poland were obtained from the ORPKI Polish National dataset, which is coordinated nationwide by Jagiellonian University Medical College in cooperation with AISN PTK (Association of Cardiovascular Interventions, Polish Cardiac Society). Database characteristics and data collection methods have been previously published [3, 57]. Patients were categorized according to whether they were treated with RA or not over a 4-year period (2014–2017). Additionally, we presented the number of centers that can perform RA and centers with the highest RA procedure rate. Altogether, there are 162 centers in the database for these 4 years, but individual ones do not exist anymore, and some have just begun their activities. There are no centers in Poland not collecting data in the ORPKI database. All indices recorded in the ORPKI database are based on periprocedural data uploaded by the operator after each procedure. Therefore, they do not include all in-hospital complications, mainly those occurring after the procedure and until discharge from the hospital. Also, we did not collect follow-up data after discharge due to lack of patient IDs. At each center, the decision to perform the RA procedure was at the operators’ discretion, according to current European recommendations [4]. All clinical decisions, such as vascular access, thrombectomy, and treatment with glycoprotein (GP) IIb/IIIa inhibitors or bivalirudin, were also the choice of the operator. The definition of periprocedural complications including death, perforation, dissection, allergic reaction, cerebral stroke, puncture-site bleeding, no-reflow, procedural-related myocardial infarction or cardiac arrest remained according to the operators’ personal preferences and knowledge and with regard to current European definitions [8].

Statistical analysis

Continuous variables are presented as mean ± standard deviation. Categorical variables are presented as numeric values and percentages. Continuous variables were compared using the Kruskal-Wallis ANOVA test, whereas in the case of categorical variables they were compared using the χ2 test. Statistical significance was accepted at a 0.05 level of probability. Statistical analyses were performed using the Statistica 10.0 software (Dell Software, Inc, Round Rock, TX, USA).

Results

General trends in RA frequency and the number of catheterization laboratories

The number of catheterization centers performing RA increased from 25 (15.5%) in 2014 to 55 (34%) in 2017, which was statistically significant (p = 0.001). Also, the number of RA procedures increased in successive years from 181 (0.19%) in 2014 to 698 (0.61%) in 2017. Despite the increase in the number of catheterization centers, the percentage of patients undergoing RA procedures in high-volume centers with an RA rate greater than 10 per year remained high and stable. Their value was 64.6%, 85.6%, 83.6% and 83.7%. When the rate of RA was greater than 20 per year, there was a slight tendency towards a decrease, and this totaled 51.4%, 54.1%, 34.1% and 46.8% in the successive years (from 2014 to 2017). The number of catheterization laboratories performing more than 20 RA procedures per year significantly increased in the studied period from 3 (12%) to 8 (22.2%), 5 (11.1%) and 10 (18.2%) in the successive years (from 2014 to 2017). This is presented in Table I and Figure 1.

Table I

Number of catheterization laboratories and patients in which rotational atherectomy angioplasties were performed in Poland between 2014–2017

VariableYearsP-value
2014201520162017
Number of cath labs performing RA25 (15.5)36 (22.3)45 (27.9)55 (34.1)0.001
Number of cities performing RA17222836
Number of patients treated with PCI and RA181458536698
Number of cath labs with > 10 RA/year5 (20)19 (52.8)24 (53.3)28 (51)0.03
Number of patients in cath labs with > 10 RA/year117 (64.6)392 (85.6)448 (83.6)584 (83.7)< 0.001
Number of cath labs with > 20 RA/year3 (12)8 (22.2)5 (11.1)10 (18.2)0.51
Number of patients in cath labs with > 20 RA/year93 (51.4)248 (54.1)183 (34.1)327 (46.8)< 0.001
Number of cath labs with > 30 RA/year2 (8)3 (8.3)3 (6.7)3 (5.4)0.95
Number of patients in cath labs with > 30 RA/year71 (39.2)107 (23.4)133 (24.8)166 (23.8)< 0.001
Number of cath labs with > 50 RA/year0 (0)1 (2.8)1 (2.2)2 (3.6)0.81
Number of patients in cath labs with > 50 RA/year0 (0)50 (10.9)58 (10.8)134 (19.2)< 0.001

[i] cath lab – catheterization laboratory, PCI – percutaneous coronary intervention, RA – rotational atherectomy.

Figure 1

Number of catheterization laboratories in Poland with the rate of RA procedures more than 20 per year in 2014–2017: A – 2014, B – 2015, C – 2016, D – 2017

/f/fulltexts/PWKI/34710/PWKI-15-81387-g001_min.jpg

General characteristics

The frequency of concomitant diseases in successive years did not differ significantly between particular years, with one exception for prior PCIs. Their rate was higher in 2016 compared to others. Nonetheless, the frequency of concomitant diseases tends to decrease for diabetes, hypertension, prior coronary artery bypass grafting operation and cerebral stroke, smoking habits, and kidney failure, and also the mean age was lower in the most recent year (Table II).

Table II

General characteristics, clinical presentation, vascular access and angiographic image of patients treated with rotational atherectomy in Poland between 2014–2017

VariableYearsP-value
2014201520162017
All percutaneous coronary interventions92,425110,912113,848114,282< 0.001
Rotational atherectomy181 (0.19)458 (0.41)536 (0.47)698 (0.61)
Age [years]72.3 (10.4)71.8 (9.5)71.5 (9.6)71.4 (9.7)0.85
Gender, male117 (65.7)314 (68.5)370 (69)482 (69)0.85
Diabetes63 (34.8)154 (33.6)184 (34.3)218 (31.3)0.62
Prior myocardial infarction84 (46.4)225 (49.1)277 (51.7)338 (48.4)0.56
Prior percutaneous coronary interventions90 (49.7)245 (53.5)339 (63.2)359 (51.4)< 0.001
Prior coronary artery bypass grafting31 (17.1)66 (14.4)84 (15.7)88 (12.6)0.3
Prior cerebral stroke10 (5.5)21 (4.6)20 (3.7)30 (4.3)0.76
Kidney failure25 (13.8)56 (12.2)54 (10.1)81 (11.6)0.48
Hypertension149 (82.3)355 (77.5)419 (78.2)515 (73.8)0.06
Chronic obstructive pulmonary disease12 (2.62)18 (3.3)18 (2.57)0.67
Smoking34 (18.8)57 (12.4)83 (15.5)104 (14.9)0.21
Clinical presentation before PCI:
 Stable angina92 (50.8)185 (41)360 (67.4)441 (63.3)< 0.001
 Unstable angina62 (34.2)71 (15.7)123 (23)177 (25.4)< 0.001
 NSTEMI17 (9.4)69 (15.3)43 (8)62 (8.9)< 0.001
 STEMI10 (5.5)126 (27.9)8 (1.5)16 (2.3)< 0.001
Vascular access:
 Femoral95 (52.5)214 (46.7)199 (37.1)64 (25.9)< 0.001
 Radial left19 (10.5)42 (9.2)59 (11)22 (8.9)0.72
 Radial right66 (36.5)200 (43.7)274 (51.1)160 (64.8)< 0.001
 Other1 (0.5)2 (0.4)4 (0.7)1 (0.4)0.9
Angiographic image:
 Single vessel disease64 (35.3)65 (34.9)74 (38.5)85 (34.4)0.82
 MVD without LMCA involvement92 (50.8)89 (47.8)88 (45.8)121 (49)0.8
 MVD with LMCA involvement24 (13.2)30 (17.2)29 (15.1)41 (16.6)0.8
 Separate LMCA involvement1 (0.5)2 (1.1)1 (0.5)0 (0)0.83

[i] LMCA – left main coronary artery, MVD – multivessel disease, NSTEMI – non ST-segment elevation myocardial infarction, STEMI – ST-segment elevation myocardial infarction.

Clinical presentation, angiography and vascular access

The percentage of patients with stable angina significantly increased from the year 2014 to 2017 (50.8% vs. 63.1%, p < 0.001), while the percentage of patients with unstable angina (34.2% vs. 25.4%, p < 0.001), non-ST segment elevation myocardial infarction (9.4% vs. 8.9%, p < 0.001) and ST segment elevation myocardial infarction (5.5% vs. 2.3%, p < 0.001) tended to decrease significantly. Similarly as in the general population of patients treated with PCI, those with additional RA usage were significantly more often treated from right radial access in 2017 (64.8%) compared to 2014 (36.5%, p < 0.001), while femoral access was rare (52.5% vs. 25.9%, p < 0.001). The angiographic image of patients qualified for PCI with RA did not change significantly in successive years (from 2014 to 2017), but a slight trend was noted regarding the increase in the percentage of patients with multivessel disease and left-main coronary artery involvement (from 13.2% in 2014 to 16.6% in 2017). This is presented in Table II.

Procedural-related variables and culprit lesion characteristics

In successive years (from 2014 to 2017), over 98% of patients were treated with PCI and RA due to de-novo lesions. There were no patients with in-stent thrombosis. The rate of restenosis was comparable in successive years and ranged from 1.2% to 1.9%. The mean contrast volume (244.4 ±111.9 ml vs. 208.9 ±96 ml, p = 0.0004) and radiation dose (2.36 ±1.58 Gy vs. 1.5 ±1.2 Gy, p < 0.001) significantly decreased in successive years from 2014 to 2017. Drug-eluting stents were implanted significantly more often in 2017 compared to 2014 (96.9% vs. 99.7%, p < 0.001), contrary to bare-metal stents, which were significantly less often used in 2017 (1.5% vs. 0.2%). Also, the frequency of intravascular ultrasound increased significantly in successive years from 3.9% in 2014 to 6.9% in 2017 (p = 0.01). This is presented in Table III.

Table III

Procedural indices, effectiveness of rotational atherectomy expressed as TIMI flow grade before and after PCI and procedure-related complications in patients treated with rotational atherectomy in Poland in the period 2014–2017

VariableYearsP-value
2014201520162017
Contrast volume [ml]244.4 (111.9)235.8 (120.7)211.9 (86.5)208.9 (96)0.0004
Radiation dose [Gy]2.36 (1.58)1.88 (1.33)1.71 (1.35)1.5 (1.2)< 0.001
Type of culprit lesion:
De novo246 (98.4)607/619 (98.1)733 (98.6)1,009 (98.8)0.64
 Restenosis4/250 (1.6)12/619 (1.9)10 (1.3)12 (1.2)0.64
In-stent thrombosis0 (0)0 (0)0 (0)0 (0)
Type of intervention:
Drug-eluting stent251 (96.9)583 (97.2)707 (99.6)954 (99.7)< 0.001
Bare-metal stent4/259 (1.5)7/600 (1.2)3/710 (0.4)2/957 (0.2)0.02
Bioresorbable scaffold0 (0)10/600 (1.7)0 (0)1/957 (0.1)< 0.001
Drug-coated balloon5/181 (2.7)9/458 (2)8/536 (1.5)4/698 (0.6)0.07
Fractional flow reserve2 (1.1)7 (1.5)2 (0.4)7 (1)0.31
Intravascular ultrasound7 (3.9)19 (4.1)16 (3)48 (6.9)0.01
Optical coherence tomography1 (0.55)9 (2)0 (0)3 (0.4)0.0016
Bifurcation23/181 (12.7)44/458 (9.6)64/536 (11.9)97/698 (13.9)0.17
Chronic total occlusion9/181 (5)19/458 (4.1)26/536 (4.8)26/698 (3.7)0.75
TIMI grade flow before PCI:
014/175 (8)33/441 (7.5)39/524 (7.4)44/676 (6.5)0.86
117/175 (9.7)64/441 (14.5)79/524 (15.1)133/676 (19.7)0.005
249/175 (28)110/441 (24.9)107/524 (20.4)154/676 (22.8)0.14
395/175 (54.3)234/441 (53.1)299/524 (57.1)345/676 (51)0.22
TIMI grade flow after PCI:
00/176 (0)2/448 (0.4)4/527 (0.7)3/685 (0.4)0.63
11/176 (0.6)4/448 (0.9)1/527 (0.2)4/685 (0.6)0.52
 24/176 (2.3)7/448 (1.6)11/527 (2.1)25/685 (3.6)0.13
 3171/176 (97.1)435/448 (97.1)511/527 (97)653/685 (95.3)0.29
Procedure-related complications:
 All complications15 (8.28)12 (2.62)16 (2.98)23 (3.29)0.003
 Coronary artery perforation3 (1.65)4 (0.87)5 (0.93)6 (0.85)0.79
 Death1 (0.55)0 (0)0 (0)1 (0.14)0.2
 Cerebral stroke3 (1.65)0 (0)0 (0)0 (0)0.01
 No-reflow phenomenon2 (1.1)2 (0.43)4 (0.74)2 (0.28)0.48
 Myocardial infarction1 (0.55)0 (0)1 (0.18)3 (0.42)0.45
 Arterial dissection1 (0.55)1 (0.53)0 (0)1 (0.4)0.79
 Cardiac arrest3 (1.65)4 (0.87)2 (0.37)6 (0.85)0.39
 Bleeding0 (0)1 (0.21)2 (0.37)3 (0.42)0.79
 Allergic reaction0 (0)0 (0)2 (0.37)1 (0.14)0.46

[i] PCI – percutaneous coronary intervention, TIMI – thrombolysis in myocardial infarction.

Angiographic effectiveness

Angiographic effectiveness expressed as TIMI flow grade after PCI with RA did not change significantly in successive years. However, the percentage of patients with TIMI flow grade 3 was non-significantly lower in patients in 2017 compared to 2014 (95.3% vs. 97.1%); when combined with TIMI flow 2 (patent target artery) after PCI, it reached over 98% each successive year from 2014 to 2017. It is also worth underlining that in successive years, from 2014 to 2017, there was a significant increase in the number of more advanced lesions, which was expressed as an increased rate of patients with TIMI 1 grade flow before PCI with RA (9.7% vs. 19.7%, p = 0.005). This was parallel to the non-significant decrease of patients with TIMI 2 and 3 grade flow before PCI with RA. This is presented in Table III.

Similarly, after the division of the overall group according to the volume of RA performed in particular centers (< 20 RA per year <), there were no significant differences in procedural effectiveness or in the overall population in successive years. This is presented in Table IV.

Table IV

Effectiveness of rotational atherectomy expressed as TIMI flow grade before and after PCI in Poland during 2014–2017 according to the number of RA procedures performed annually

TIMI grade flowNumber of RA procedures performed per year per catheterization laboratory
20142015201620172014–2017
< 20> 20< 20> 20< 20> 20< 20> 20< 20> 20
Before PCI:
 06 (7.2)8 (8.7)19 (9.4)14 (5.8)22 (6.4)17 (9.3)28 (7.5)16 (4.9)75 (7.5)55 (6.7)
 17 (8.4)10 (10.9)30 (14.8)34 (14.2)63 (18.4)16 (8.8)*78 (21)55 (18)178 (17.8)115 (14)*
 227 (32.5)22 (23.9)49 (22.1)61 (25.2)62 (18.1)45 (24.7)82 (22.1)72 (23.6)220 (22)200 (24.4)
 343 (51.8)52 (56.5)104 (51.5)130 (55.2)195 (57)104 (57.1)183 (49.3)162 (53.1)525 (52.6)448 (54.8)
After PCI:
 00 (0)0 (0)1 (0.5)1 (0.4)1 (0.3)3 (1.6)2 (0.5)1 (0.3)4 (0.4)5 (0.6)
 11 (1.2)0 (0)1 (0.5)3 (1.2)1 (0.3)0 (0)2 (0.5)2 (0.6)5 (0.5)5 (0.6)
 23 (3.6)1 (1.1)5 (2.5)2 (0.8)9 (2.6)2 (1.1)14 (3.8)11 (3.5)31 (3.1)16 (1.9)
 380 (95.2)91 (98.9)194 (96.5)241 (97.6)334 (96.8)177 (97.2)352 (95.1)301 (95.5)960 (96)810 (96.9)

* p < 0.05 comparing the difference between centers with > and < than 20 RA procedures per year; PCI – percutaneous coronary intervention, RA – rotational atherectomy, TIMI – thrombolysis in myocardial infarction.

Periprocedural complications

The overall complication rate decreased significantly from 2014 to 2017 (8.28% vs. 3.29%, p = 0.003); however, in the last 3 years (2015–2017), it remained stable at around 3%. Particular components of the overall complication rate did not change during the analyzed period, except for procedure-related cerebral stroke, which reached 1.65% in 2014, while there were no cerebral strokes related to the RA procedure in successive years.

Similarly, after the division of the overall group according to the volume of RA performed in particular centers (< 20 RA per year <), there were no significant differences in procedure-related complication rates or in the overall population in successive years. However, the rate of periprocedural complications tended to be higher in low-volume centers in successive years and the overall population. Besides the fact that the overall complication rate tended to be higher in low-volume centers, the rate of coronary artery perforations was significantly higher in high-volume centers compared to low-volume ones (p < 0.05) regarding particular complications in the overall group of patients (Table V).

Table V

Procedure-related complications in patients treated with rotational atherectomy in Poland during 2014–2017 according to the number of RA procedures performed annually

VariableNumber of RA procedures performed per year per catheterization laboratory
20142015201620172014–2017
< 20> 20< 20> 20< 20> 20< 20> 20< 20> 20
All complications8 (9.1)7 (7.5)5 (2.4)7 (2.8)11 (3.1)5 (2.7)14 (3.8)9 (2.7)38 (3.7)28 (3.3)
CAP0 (0)3 (3.2)1 (0.5)3 (1.2)2 (0.6)3 (1.6)2 (0.5)4 (1.2)5 (0.5)13 (1.5)*
Death1 (1.1)1 (1)0 (0)0 (0)0 (0)0 (0)1 (0.3)0 (0)2 (0.2)1 (0.1)
Cerebral stroke3 (3.4)0 (0)0 (0)0 (0)0 (0)0 (0)0 (0)0 (0)3 (0.8)0 (0)
No-reflow1 (1.1)1 (1.1)2 (0.9)0 (0)3 (0.8)1 (0.5)1 (0.3)1 (0.3)7 (0.7)3 (0.3)
MI1 (1.1)0 (0)0 (0)0 (0)1 (0.3)0 (0)1 (0.3)2 (0.6)3 (0.3)2 (0.2)
Arterial dissection1 (1.1)0 (0)1 (1.6)0 (0)0 (0)0 (0)1 (0.9)0 (0)3 (0.8)0 (0)
Cardiac arrest1 (1.1)2 (2.1)1 (0.5)3 (1.2)1 (0.3)1 (0.5)5 (1.3)1 (0.3)8 (0.8)7 (0.82)
Bleeding0 (0)0 (0)0 (0)1 (0.4)2 (0.6)0 (0)2 (0.5)1 (0.3)4 (0.4)2 (0.2)
Allergic reaction0 (0)0 (0)0 (0)0 (0)2 (0.6)0 (0)1 (0.3)0 (0)3 (0.3)0 (0)

* P < 0.05 comparing the difference between centers with > and < than 20 RA procedures per year. CAP – coronary artery perforation, MI – myocardial infarction, RA – rotational atherectomy.

Discussion

The main finding of the current study is that the rate of PCI with RA increased more than three-fold in the last four years. This was accompanied by a simultaneous increase in the number of catheterization laboratories able to perform RA. The number of those centers increased more than two-fold. The increase in the number of catheterization laboratories was not accompanied by a decrease in the overall number of patients treated at high-volume centers with the annual rate of rotablations more than 10 or 20 procedures per year. It could be concluded that the increase in low-volume small centers able to perform rotablation was compensated by the parallel increase in the number of patients treated at high-volume centers. This indicates that the demand for rotational procedures in Poland is still greater than their supply, i.e. the current number of treatments performed. Based on those trends, it could be suspected that the results of rotablations would be poorer due to the fact that more patients are treated at less experienced centers. To reduce the possibility of such a phenomenon, a number of Proctor courses are held in Poland that maintain the performance of RA procedures at a high and acceptable level, despite the decentralization of their performance. In addition, a number of treatments at low-volume centers are performed under the supervision of operators from high-volume centers to maintain high quality rotablations. All of these activities contribute to the fact that both the frequency of complications and the effectiveness of the treatments estimated as the patency of the vessel after the procedure are maintained at a stable level.

Based on the current analysis, patients qualified for PCI with RA presented more complicated lesions including left-main coronary artery involvement in multi-vessel disease in successive years, but on the other hand, there were more patients with stable angina before the procedure in more recent years. Thus, it may be concluded that preparation for the procedure was better.

However, a number of recently published papers encourage operators to use rotablation more frequently in acute coronary syndromes [9]. The procedure effectiveness assessed as target artery patency did not decrease in the most recent years, even though target arteries had poorer TIMI grade flow before the procedure in recent years. While the dissemination and progression of coronary artery atherosclerosis of patients qualified for PCI with RA tended to be greater, the rate of concomitant diseases and the mean age tended to decrease. This could suggest that among sick patients, those less ill have been treated in the most recent years within the aspect of the general clinical state, while concerning coronary atherosclerosis, patients treated with RA tend to present more advanced coronary atherosclerosis. Moreover, it has to be mentioned that remaining in line with current trends, femoral, instead of radial access, has become a minority. This was also indicated in one of the previously published papers analyzing Polish patients treated with RA and other reports [10, 11] was and was also not reflected in the increased rate of procedure-related complications, which was stable in the last 3 years of the present analysis and was around 3%. It should be noted that most of the previously published registers concerned significantly smaller groups of patients, and their analysis included complications from the entire hospitalization period and not only from the stay in the catheterization room. That is why their percentages were higher compared to our study [12, 13]. However, one may have reservations about the low frequency and underestimation of the number of procedure-related complications, but in the case of analysis among large groups of patients, it is assumed that certain trends do not change significantly and reflect real life [14].

Limitations

This study was based on a nationwide volunteer registry rather than a prospective randomized clinical trial. This tends to decrease and underestimate the detection of periprocedural complication rates and other crucial variables which are dependent on subjective assessment of the operator, despite the large overall interventional volume included in our analysis. Also, the assessment of blood flow in the target artery using the TIMI scale is subjective and depends on individual operators, despite the fact that a large number of procedures can significantly reduce this effect. Furthermore, the current analysis does not include all in-hospital complications, which certainly weakens its value. The low percentage of myocardial infarctions is particularly noteworthy. Nonetheless, the advantage of the current study is that the results are closer to real life than to randomized clinical trials and show clinical data depicting the results of rotational atherectomy in Poland as one of the leaders in Central Europe.

Conclusions

The current trends and procedural outcomes of PCI with RA are promising. The substantial increase in the number of low-volume centers and patients treated at them is compensated by the increase in the number of patients at high-volume centers. Continuous substantive supervision and permanent training contribute to maintaining a high level of rotablation. Those fluctuations in the location of RA treatment are not related to poorer procedural outcomes or an increased rate of procedure-related complications. Shortening the time of surgery, the greater frequency of radial access and reducing the dose of contrast also contribute to lessening the percentage of procedure-related complications. Such a rapid increase in the number of treatments and centers performing them indicate very high market demand for rotablation.

Conflict of interest

The authors declare no conflict of interest.

References

1 

Kini A, Marmur JD, Duvvuri S, et al. , authors. Rotational atherectomy: improved procedural outcome with evolution of technique and equipment. Single-center results of first 1,000 patients. Catheter Cardiovasc Interv. 1999. 46:p. 305–11

2 

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