TY - JOUR
T1 - Hemodynamic effects of tachycardias produced by atrial and ventricular pacing
AU - Samet, Philip
AU - Bernstein, William H.
AU - Levine, Sydney
AU - Lopez, Alfredo
N1 - Funding Information:
RESULTS One hundred and fifty-four paired comparisons of cardiac index during atria1 and ventricular pacing, respectively, at identical ventricular rates were carried out in the fifty-four patients. The results are shown in Figures 1 through 4. The indices during atria1 pacing (A.P.) are plotted on the abscissa, and the corresponding values during ventricular pacing on the ordinate. The line of identity is labeled 0 per cent. Ten and 20 per cent deviations from the line of identity are drawn. It is readily noted that most points fall below the zero per cent line, i.e., that atria1 indices are higher than ventricular indices at the same ventricular rate. The average cardiac index during atria1 pacing was 2.76 L. per minute per M2.; the corresponding average cardiac inder during ventricular pacing was * From the Section of Cardiology, Department of Medicine, Mount Sinai Hospital, Miami Beach; and the Section of Cardiology, Department of Medicine, University of Miami School of Medicine, Coral Gables, Florida. This study was supported by National Heart Institute Grant H-08503-02. Manuscript received March 10, 1965.
PY - 1965/12
Y1 - 1965/12
N2 - The hemodynamic effects of right atrial and ventricular bipolar catheter pacing were investigated in fifty-four subjects in sinus rhythm. Right and left heart pressures were measured, and cardiac outputs determined by the indicator dilution method, at both control sinus rates and during atrial and ventricular tachycardias at varying rates above the control sinus rate, induced by atrial and ventricular catheter electrodes. The results of this study clearly demonstrate that, in intact man, ventricular pacing, at ventricular rates similar to those induced by atrial pacing, result in decrements in cardiac output and in systemic arterial pressures, together with atrioventricular regurgitation. The application of these data to synchronous or idioventricular pacing in patients in complete heart block seems evident.
AB - The hemodynamic effects of right atrial and ventricular bipolar catheter pacing were investigated in fifty-four subjects in sinus rhythm. Right and left heart pressures were measured, and cardiac outputs determined by the indicator dilution method, at both control sinus rates and during atrial and ventricular tachycardias at varying rates above the control sinus rate, induced by atrial and ventricular catheter electrodes. The results of this study clearly demonstrate that, in intact man, ventricular pacing, at ventricular rates similar to those induced by atrial pacing, result in decrements in cardiac output and in systemic arterial pressures, together with atrioventricular regurgitation. The application of these data to synchronous or idioventricular pacing in patients in complete heart block seems evident.
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U2 - 10.1016/0002-9343(65)90112-9
DO - 10.1016/0002-9343(65)90112-9
M3 - Article
C2 - 5322354
AN - SCOPUS:0013840881
VL - 39
SP - 905
EP - 910
JO - American Journal of Medicine
JF - American Journal of Medicine
SN - 0002-9343
IS - 6
ER -