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Figure 1

Proposed algorithm for transradial BAV, regarding sheath and balloon size selection. Steps: (1) Measure the LOVT size by transthoracic ultrasound; (2) Select balloon type (use low profile 7-8F compatible balloon); (3) Select balloon size (0.8 balloon/LVOT ratio); (4) Perform vascular ultrasound (radial and ulnar artery size, calcification). Abbreviation: BAV, balloon aortic valvuloplasty; LVOT, left ventricular outflow tract.
Proposed algorithm for transradial BAV, regarding sheath and balloon size selection. Steps: (1) Measure the LOVT size by transthoracic ultrasound; (2) Select balloon type (use low profile 7-8F compatible balloon); (3) Select balloon size (0.8 balloon/LVOT ratio); (4) Perform vascular ultrasound (radial and ulnar artery size, calcification). Abbreviation: BAV, balloon aortic valvuloplasty; LVOT, left ventricular outflow tract.

Figure 2

Competing risk analysis curves.
Competing risk analysis curves.

Effect of BAV. CCS, Canadian Cardiovascular Society; NYHA, New York Heart Association; LVEF, left ventricular ejection fraction; LV, left ventricle; EDD, end diastolic diameter; ESD, end systolic diameter; AI, aortic insufficiency

  Before BAV After BAV P-value
Symptoms scores
Angina class (CCS)     0.025
0 16 (53.3%) 23 (76.7%)  
1 2 (6.67%) 5 (16.7%)  
2 5 (16.7%) 2 (6.67%)  
3 3 (10.0%) 0 (0.0%)  
4 4 (13.3%) 0 (0.0%)  
NYHA class     <0.001
1 0 (0.0%) 8 (26.7%)  
2 0 (0.0%) 18 (60.0%)  
3 15 (50.0%) 2 (6.67%)  
4 15 (50.0%) 2 (6.67%)  
Catheterization
Peak-to-peak gradient across aortic valve, mmHg 94.6±31.9 40.0±15.6 <0.001
Echocardiography
LVEF, % 47.9±17.6 50.2±13.8 0.593
LV EDD, mm 52.0 (45.2-59.0) 48.0 (44.5-58.0) 0.585
LV ESD, mm 36.7±9.60 37.2±8.21 0.773
Aortic valve peak gradient, mmHg 87.1±8.8 63.3±29.3 0.004
Aortic valve mean gradient, mmHg 56.0±20.2 36.7±14.0 0.092
AI grade     0.515
0 14 (46.6%) 3 (10%)  
1 10 (33.3%) 14 (46.6%)  
2 5 (16.6%) 12 (40%)  
3 1 (3.33%) 1 (3.33%)  

Procedural characteristics

Variable Value
Sheath #1 size (French)  
5, n (%) 1 (3.33%)
6, n (%) 1 (3.33%)
7, n (%) 13 (43.3%)
8, n (%) 12 (40.0%)
9, n (%) 1 (3.33%)
10, n (%) 2 (6.67%)
Sheath #2 size (French)  
5, n (%) 3 (10.0%)
6, n (%) 24 (80.0%)
7, n (%) 2 (6.67%)
8, n (%) 1 (3.33%)
Balloon size  
14x20, n (%) 1 (3.33%)
14x40, n (%) 2 (6.67%)
16x20, n (%) 1 (3.33%)
16x40, n (%) 12 (40.0%)
18x40, n (%) 13 (43.3%)
2x12x40, n (%) 1 (3.33%)
Contrast volume, mL 82.7 (39.8)
Procedure time, min 48.2 (12.5)

Patient characteristics. TAVI, transcatheter aortic valve implantation; BMI, body mass index; CKD, chronic kidney disease; DM, diabetes mellitus; AHT, arterial hypertension; MI, myocardial infarction; CABG, coronary artery bypass grafting; COPD, chronic obstructive pulmonary disease; CVA, cerebrovascular accident; balloon aortic valvuloplasty, BAV.

  All patients (N=30) BAV only (N=14) BAV + TAVI (N=16) P-value
Length of follow-up, months 22.8 (21.3-24.3) 21.9 (10.4-24.2) 23.0 (22.1-24.3) 0.253
Time to TAVI, months     3.33 (2.49-4.38) NA
Age, years 78.3±7.14 79.4±5.62 77.4±8.31 0.443
Male, n (%) 12 (40.0%) 5 (35.7%) 7 (43.8%) 0.940
BMI, kg/m2 26.7 (23.2-29.4) 26.6 (24.0-29.3) 26.7 (22.8-29.3) 0.835
CKD, n (%) 15 (50.0%) 10 (71.4%) 5 (31.2%) 0.067
DM, n (%) 14 (46.7%) 7 (50.0%) 7 (43.8%) 1.000
AHT, n (%) 27 (90.0%) 12 (85.7%) 15 (93.8%) 0.586
Smoking, n (%) 2 (6.67%) 1 (7.14%) 1 (6.25%) 1.000
Family history of cardiovascular disease, n (%) 4 (13.3%) 3 (21.4%) 1 (6.25%) 0.315
Dyslipidemia, n (%) 17 (56.7%) 8 (57.1%) 9 (56.2%) 1.000
Previous MI, n (%) 8 (26.7%) 5 (35.7%) 3 (18.8%) 0.417
Previous CABG, n (%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 1.000
COPD, n (%) 2 (6.67%) 2 (14.3%) 0 (0.00%) 0.209
Atrial fibrillation, n (%) 13 (43.3%) 7 (50.0%) 6 (37.5%) 0.749
CVA, n (%) 2 (6.67%) 1 (7.14%) 1 (6.25%) 1.000
Permanent pacemaker, n (%) 1 (3.33%) 1 (7.14%) 0 (0.00%) 0.467
Peripheral artery disease, n (%) 14 (46.7%) 7 (50.0%) 7 (43.8%) 1.000
Initial BAV indication       0.782
Severe aortic stenosis 21 (70.0%) 11 (78.6%) 10 (62.5%)  
Severe aortic stenosis + acute heart failure 7 (23.3%) 3 (21.4%) 4 (25.0%)  
Severe aortic stenosis + cardiogenic shock 2 (6.66%) 0 (0.00%) 2 (12.5%)  
Repeat BAV 1 (3.33%) 1 (7.14%) 0 (0.00%) 0.467

Estimates accompanying the cumulative incidence analysis (Figure 2)

Time (months) Number at risk TAVI, % Death, % Alive without TAVI, %
1 30 0.0 (0.0-0.0) 0.0 (0.0-0.0) 100 (100-100)
2 26 10.0 (2.5-23.9) 3.3 (0.2-14.8) 83.7 (75.3-99.7)
3 22 20.0 (7.9-36.0) 6.7 (1.1-19.4) 73.3 (59.1-91.0)
4 19 30.0 (14.7-46.9) 6.7 (1.1-19.4) 63.3 (48.2-83.2)
5 16 40.0 (22.4-57.0) 6.7 (1.1-19.4) 53.3 (38.2-74.5)
10 11 50.0 (30.8-66.5) 13.3 (4.0-28.3) 36.7 (22.9-58.7)
15 10 50.0 (30.8-66.5) 16.7 (5.8-32.3) 33.3 (20.1-55.3)
20 9 50.0 (30.8-66.5) 20.0 (7.8-36.2) 30.0 (17.4-51.8)
25 3 50.0 (30.8-66.5) 20.0 (7.8-36.2) 30.0 (17.4-51.8)
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