SIMPLIFIED METHOD FOR CALCULATING AORTIC-VALVE RESISTANCE - CORRELATION WITH VALVE AREA AND STANDARD FORMULA

被引:1
作者
KEGEL, JG
SCHALET, BD
CORIN, WJ
ISKANDRIAN, AS
机构
[1] Philadelphia Heart Institute, Presbyterian Medical Center of Philadelphia, Philadelphia, Pennsylvania
来源
CATHETERIZATION AND CARDIOVASCULAR DIAGNOSIS | 1993年 / 30卷 / 01期
关键词
AORTIC STENOSIS; CARDIAC CATHETERIZATION; HEMODYNAMICS; RESISTANCE;
D O I
10.1002/ccd.1810300105
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Aortic valve resistance (AVR) is a useful index to assess the severity of aortic stenosis. This study compared the standard method to calculate AVR with a simplified method based on the conventional approach for measuring vascular resistance: AVR = (peak-to-peak transaortic pressure gradient/(cardiac output*2.5))*80, where 80 is a conversion factor and 2.5 assumes that the systolic ejection period comprises 40% of the R-R cycle. We compared the standard AVR, the simplified AVR, and the Gorlin-derived value area in 118 patients with pure or dominant aortic stenosis. There was a strong linear correlation between the standard and simplified AVR (r = 0.96, p < .0001). There was a curvilinear relation between the aortic valve area and AVR (r = 0.92, p < .001). In 48 patients with aortic valve area greater-than-or-equal-to-0.7 cm2, the AVR was <300 dynes-sec-cm-5 in 45 patients (94%) by the standard method and in 42 patients (88%) by the simplified method (p = NS). In conclusion, our method for measuring AVR is accurate and simpler than the standard method. (C) 1993 Wiley-Liss, Inc.
引用
收藏
页码:15 / 21
页数:7
相关论文
共 17 条
[11]   HYDRAULIC FORMULA FOR CALCULATION OF THE AREA OF THE STENOTIC MITRAL VALVE, OTHER CARDIAC VALVES, AND CENTRAL CIRCULATORY SHUNTS .1. [J].
GORLIN, R ;
GORLIN, SG .
AMERICAN HEART JOURNAL, 1951, 41 (01) :1-29
[12]   A SIMPLIFIED VALVE FORMULA FOR THE CALCULATION OF STENOTIC CARDIAC-VALVE AREAS [J].
HAKKI, AH ;
ISKANDRIAN, AS ;
BEMIS, CE ;
KIMBIRIS, D ;
MINTZ, GS ;
SEGAL, BL ;
BRICE, C .
CIRCULATION, 1981, 63 (05) :1050-1055
[13]   DEMONSTRATION OF POSTVALVULOPLASTY HEMODYNAMIC IMPROVEMENT IN AORTIC-STENOSIS BASED ON DOPPLER MEASUREMENT OF VALVULAR RESISTANCE [J].
ISAAZ, K ;
MUNOZ, L ;
PORTS, T ;
SCHILLER, NB .
JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY, 1991, 18 (07) :1661-1670
[14]   EFFECT OF EXERCISE ON INDEXES OF VALVULAR AORTIC-STENOSIS [J].
MARTIN, TW ;
MOODY, JM ;
BIRD, JJ ;
SLIFE, D ;
MURGO, JP .
CATHETERIZATION AND CARDIOVASCULAR DIAGNOSIS, 1992, 25 (04) :265-271
[15]  
RODRIGO FA, 1953, AM HEART J, V45, P1
[16]   DYNAMICS OF ISOLATED PULMONARY STENOSIS [J].
SILBER, EN ;
PREC, O ;
GROSSMAN, N ;
KATZ, LN .
AMERICAN JOURNAL OF MEDICINE, 1951, 10 (01) :21-26
[17]   HEMODYNAMIC FACTORS THAT AFFECT CALCULATED ORIFICE AREAS IN THE MITRAL HANCOCK XENOGRAFT VALVE [J].
UBAGO, JL ;
FIGUEROA, A ;
COLMAN, T ;
OCHOTECO, A ;
DURAN, CG .
CIRCULATION, 1980, 61 (02) :388-394