ライフサイエンスコーパス: transvalvular

1 Transvalvular device lead implantation in BTV patients w

2 V implantation without undergoing subsequent transvalvular device lead implantation.

3 ical heart failure had Doppler assessment of transvalvular flow and right heart catheterization perfo

4 al entities might be identified according to transvalvular flow rates and pressure gradients, resulti

5 Knowing that transvalvular flow varies normally within one beat, we d

6 The poor correlation found with transvalvular flow velocities suggests that Ea may be re

7 tive to AS severity is due to a reduction in transvalvular flow.

8 (</=40%), low-gradient aortic stenosis (mean transvalvular gradient <40 mm Hg and indexed aortic valv

9 Low mean transvalvular gradient (<40 mm Hg) and small aortic valv

10 95% CI, 1.21-2.26; P = .001), pre-TAVR mean transvalvular gradient (0.98; 95% CI, 0.97-0.99; P = .00

11 calculated indirectly via the peak systolic transvalvular gradient (catheter).

12 BVF resulted in a reduction in the mean transvalvular gradient (from 20.5+/-7.4 to 6.7+/-3.7 mm

13 n=144) and PLG-SAS (n=205) according to mean transvalvular gradient (mean gradient >40 or </=40 mm Hg

14 left ventricular (LV) dysfunction and a low transvalvular gradient (TVG) is associated with improved

15 ncrease in aortic valve area and decrease in transvalvular gradient after TAVR.

16 cellent prosthetic valve function with a low transvalvular gradient and no left ventricular outflow t

17 Doppler-derived measures of peak and mean transvalvular gradient correlated well with reference st

18 Mean aortic transvalvular gradient decreased from 40.5 +/- 13.2 mm H

19 valve area <0.6 cm(2)/m(2)) present with low transvalvular gradient despite a normal left ventricular

20 Correlation between aortic valve weight and transvalvular gradient improved further when gender was

21 c evidence of aortic stenosis had a systolic transvalvular gradient of 57+/-6 mm Hg.

22 V) outflow, LV ejection fraction (LVEF), and transvalvular gradient on outcomes following transcathet

23 nce was uniformly good after redo TAVR (mean transvalvular gradient post redo TAVR: 12.5+/-6.1 mm Hg)

24 Hemodynamically, the mean transvalvular gradient significantly decreased after val

25 Mitral transvalvular gradient significantly decreased from 11.1

26 in patients with severe aortic stenosis, low transvalvular gradient, and severe left ventricular dysf

27 has superb hemodynamics in terms of residual transvalvular gradient, effective orifice area, and regr

28 de the following: central flow capacity, low transvalvular gradient, low thrombogenicity, durability,

29 a more physiological flow pattern and lower transvalvular gradient, which may have an important bear

30 sented, on average, 48% of the total resting transvalvular gradient.

31 and comprise approximately half of the total transvalvular gradient.

32 Another limitation is its residual transvalvular gradient.

33 The ACURATE neo presented lower mean transvalvular gradients (9.3 versus 14.5 mm Hg; P<0.001)

34 ht, in general, the women had higher average transvalvular gradients (p </= 0.005) and lower average

35 with no difference in mean and peak systolic transvalvular gradients 1 year after surgery.

36 with the ACURATE neo valve resulted in lower transvalvular gradients and consequently less prosthesis

37 heter valves and results in reduced residual transvalvular gradients and increased valve effective or

38 a (EOA) of a prosthetic valve is superior to transvalvular gradients as a measure of valve function,

39 Elevated transvalvular gradients during follow-up were observed i

40 the weights of stenotic aortic valves to the transvalvular gradients or to the calculated aortic valv

41 There was a mild but significant increase in transvalvular gradients over time after TAVR.

42 The peak and mean transvalvular gradients were 4.6+/-1.8 mm Hg and 2.6+/-1

43 Transvalvular gradients were measured postoperatively by

44 Based on these data, transvalvular lead implantation appears to be an accepta

45 prosthetic TR in patients with and without a transvalvular lead more commonly occurred 2 years or lat

46 w-up of 25 months, in 5 patients (9%) with a transvalvular lead significant (moderate or greater) pro

47 itation compared with BTV patients without a transvalvular lead.

48 dence of TR in BTV patients with and without transvalvular leads (p = 0.45).

49 avalvular leakage was observed in 113 (32%), transvalvular leakage in 47 (13%), and both in 12 (3%).

50 tion (EF) < or =35% and aortic stenosis with transvalvular mean gradient <30 mm Hg underwent aortic v

51 ite severe left ventricular dysfunction, low transvalvular mean gradient, and increased operative mor

52 The mean transvalvular mitral gradient was </=4 mm Hg in all pati

53 Transvalvular peak pressure drops are routinely assessed

54 valve weight, age at operation, preoperative transvalvular peak pressure gradient, calculated aortic

55 lder age, valves of lighter weight and lower transvalvular peak pressure gradients, and more often si

56 cised stenotic aortic valves to preoperative transvalvular peak systolic gradients and to calculated

57 Preoperative transvalvular peak systolic pressure gradients across st

58 s increased (from <1 g to >6 g), the average transvalvular peak systolic pressure gradients progressi

59 onstrated a consistent overestimation of the transvalvular pressure (average of 54%, range 5%-136%) r

60 tretching of valve tissue caused by elevated transvalvular pressure can activate valvular interstitia

61 Mean and peak transvalvular pressure gradients were 4.4 +/- 1.6 mm Hg

62 esophageal echocardiography (TEE) as well as transvalvular pressure measurements during cardiac cathe

63 erate prosthetic valve dysfunction (moderate transvalvular regurgitation in 1, moderate stenosis in 1

64 Moderate/severe transvalvular regurgitation was noted in 89 patients (3.

65 No cases of transvalvular regurgitation were seen.

66 by reintervention, adverse hemodynamics, or transvalvular regurgitation.

67 e, 186 patients (52%) had no paravalvular or transvalvular regurgitation.

68 timal cusp loading conditions and minimizing transvalvular turbulence.