Circulation, Vol 76, 819-826, Copyright © 1987 by American Heart Association
SJ Bhatia, JM Kirshenbaum, RJ Shemin, LH Cohn, JJ Collins, VJ Di Sesa, PJ Young, GH Mudge Jr and MG Sutton
Most patients with severe congestive heart failure have secondary pulmonary
hypertension (PHT). Elevation of pulmonary vascular resistance (PVR) to
greater than 480 dynes.sec.cm-5 (6 Wood units) is currently the principle
hemodynamic contraindication to orthotopic cardiac transplantation. We
performed serial two-dimensional Doppler echocardiographic examinations and
right heart catheterizations in 24 recipients (21 men, 14-58 years old) of
orthotopic cardiac transplants to determine the time course of resolution
of PHT and the concomitant remodeling of the donor right ventricle. Right
and left heart filling pressures declined in parallel and reached the upper
normal range at 2 weeks after the transplant procedure and remained
unchanged at 1 year follow-up. Mean pulmonary arterial pressure (mm Hg)
decreased from 38 +/- 9 preoperatively to 22 +/- 5 at 2 weeks and was 19
+/- 5 at 1 year after the transplantation procedure. At 1 year after
surgery, PVR had decreased from 202 +/- 89 dynes.sec.cm-5 preoperatively to
99 +/- 36 dynes.sec.cm-5 (p less than .001), while cardiac output increased
from 3.7 +/- 1.2 to 6.3 +/- 1.5 liters/min (p less than .001).
Echocardiographic analysis showed that transplant recipients had an
enlarged right ventricle on day 1 after surgery, and a volume overload
contraction pattern and tricuspid regurgitation was present in the
majority. This increase in right ventricular size was maintained at 1 year
follow-up while the incidence of tricuspid regurgitation decreased. We
conclude that there is rapid resolution of moderately elevated pulmonary
arterial pressures after cardiac transplantation.(ABSTRACT TRUNCATED AT 250
WORDS)
ARTICLES
Time course of resolution of pulmonary hypertension and right ventricular remodeling after orthotopic cardiac transplantation
Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115.
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