HEMODYNAMIC IMPORTANCE OF SYSTOLIC VENTRICULAR INTERACTION, AUGMENTED RIGHT ATRIAL CONTRACTILITY AND ATRIOVENTRICULAR SYNCHRONY IN ACUTE RIGHT VENTRICULAR DYSFUNCTION

被引:91
作者
GOLDSTEIN, JA [1 ]
HARADA, A [1 ]
YAGI, Y [1 ]
BARZILAI, B [1 ]
COX, JL [1 ]
机构
[1] WASHINGTON UNIV, SCH MED, DEPT SURG, DIV CARDIOTHORAC SURG, ST LOUIS, MO 63110 USA
关键词
D O I
10.1016/0735-1097(90)90477-7
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
To delineate the determinants of right ventricular performance with acute right ventricular dysfunction, surgical electrical isolation of the right ventricular free wall was produced in 13 dogs. During atrioventricular (AV) pacing, hemodynamic and wall motion measurements were normal. When not paced, the right ventricular free wall became asystolic, resulting in a depressed and bifid right ventricular systolic pressure (33 ± 5 to 18 ± 4 mm Hg) and decreased left ventricular systolic pressure (100 ± 18 to 80 ± 18 mm Hg) and stroke volume (14 ± 4 to 10.3 ± 3.5 ml) (all p < 0.05). Ultrasound demonstrated right ventricular free wall dyskinesia, increased right ventricular enddiastolic size (13 ± 13% of control), but decreased left ventricular size (69 ± 11% of control) (both p < 0.05). Right atrial pressure increased (5.8 ± 2.5 to 7.6 ± 2.8 mm Hg, p < 0.05) with an augmented A wave and blunted Y descent, indicating pandiastolic right ventricular dysfunction. The septum demonstrated reversed curvature in diastole and paradoxically into the right ventricle during early systole, generating the initial peak of right ventricular pressure and reducing its volume. Later, posterior septal motion coincided with maximal left ventricular pressure and the second peak of the right ventricular waveform. Left ventricular pacing alone led to further decreases in right ventricular systolic pressure and size, left ventricular systolic pressure and stroke volume. The previously augmented A wave was replaced by a prominent V wave. Therefore, when contractility of its free wall is acutely depressed, right ventricular performance is dependent on left ventricular-septal contractile contributions transmitted by the septum. Augmented right atrial contraction and intact AV synchrony enhance ventricular filling and performance and are important determinants of cardiac output. © 1990.
引用
收藏
页码:181 / 189
页数:9
相关论文
共 47 条
[1]   THE SPECTRUM OF RIGHT VENTRICULAR INVOLVEMENT IN INFERIOR WALL MYOCARDIAL-INFARCTION - A CLINICAL, HEMODYNAMIC AND NON-INVASIVE STUDY [J].
BAIGRIE, RS ;
HAQ, A ;
MORGAN, CD ;
RAKOWSKI, H ;
DROBAC, M ;
MCLAUGHLIN, P .
JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY, 1983, 1 (06) :1396-1404
[2]  
BAKOS ACP, 1950, CIRCULATION, V1, P725
[3]   STUDIES ON STARLINGS LAW OF HEART .4. OBSERVATIONS ON HEMODYNAMIC FUNCTIONS OF LEFT ATRIUM IN MAN [J].
BRAUNWALD, E ;
FRAHM, CJ .
CIRCULATION, 1961, 24 (03) :633-&
[4]   INFLUENCE OF RIGHT ATRIAL PRESSURE PULSE ON INSTANTANEOUS VENA CAVAL BLOOD FLOW [J].
BRAWLEY, RK ;
OLDHAM, HN ;
VASKO, JS ;
HENNEY, RP ;
MORROW, AG .
AMERICAN JOURNAL OF PHYSIOLOGY, 1966, 211 (02) :347-&
[5]   PERFORMANCE OF RIGHT VENTRICLE UNDER STRESS - RELATION TO RIGHT COROONARY FLOW [J].
BROOKS, H ;
KIRK, ES ;
VOKONAS, PS ;
URSCHEL, CW ;
SONNENBLICK, EH .
JOURNAL OF CLINICAL INVESTIGATION, 1971, 50 (10) :2176-+
[6]   RIGHT VENTRICULAR INFARCTION - CLINICAL AND HEMODYNAMIC FEATURES [J].
COHN, JN ;
GUIHA, NH ;
BRODER, MI ;
LIMAS, CJ .
AMERICAN JOURNAL OF CARDIOLOGY, 1974, 33 (02) :209-214
[7]   VENTRICULAR COMPLIANCE IN ISCHEMIC RIGHT VENTRICULAR DYSFUNCTION [J].
COMACANELLA, I ;
LOPEZSENDON, J .
AMERICAN JOURNAL OF CARDIOLOGY, 1980, 45 (03) :555-561
[8]   LOW OUTPUT SYNDROME IN RIGHT VENTRICULAR INFARCTION [J].
COMACANELLA, I ;
LOPEZSENDON, J ;
GAMALLO, C .
AMERICAN HEART JOURNAL, 1979, 98 (05) :613-620
[9]  
COX JL, 1985, J THORAC CARDIOV SUR, V90, P212
[10]   TWO-DIMENSIONAL ECHOCARDIOGRAPHIC FEATURES OF RIGHT VENTRICULAR INFARCTION [J].
DARCY, B ;
NANDA, NC .
CIRCULATION, 1982, 65 (01) :167-173