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Atrial emptying with orthotopic heart transplantation using bicaval and pulmonary venous anastomoses: a magnetic resonance imaging study.

Abstract：

OBJECTIVES:We hypothesized that orthotopic heart transplantation with bicaval and pulmonary venous anastomoses preserves atrial contractility. BACKGROUND:The standard biatrial anastomotic technique of orthotopic heart transplantation causes impaired function and enlargement of the atria. Cine magnetic resonance imaging (MRI) allows assessment of atrial size and function. METHODS:We studied 16 patients who had undergone bicaval (n = 8) or biatrial (n = 8) orthotopic heart transplantation without evidence of rejection and a control group of 6 healthy volunteers. For all three groups, cine MRI was performed by combining coronal and axial gated spin echo and gradient echo cine sequences. Intracardiac volumes were calculated with the Simpson rule. Atrial emptying fraction was defined as the difference between atrial diastolic and systolic volumes, divided by atrial diastolic volume, expressed in percent. All patients had right heart catheterization. RESULTS:Right atrial emptying fraction was significantly higher in the bicaval (mean [+/- SD] 37 +/- 9%) than in the biatrial group (22 +/- 11%, p < 0.05) and similar to that in the control group (48 +/- 4%). Left atrial emptying fraction was significantly higher in the bicaval (30 +/- 5%) than in the biatrial group (15 +/- 4%, p < 0.05) and significantly lower in both transplant groups than in the control group (47 +/- 5%, p < 0.05). The left atrium was larger in the biatrial than in the control group (p < 0.05). Cardiac index, stroke index, heart rate and blood pressure were similar in the transplant groups. CONCLUSIONS:Left and right atrial emptying fractions are significantly depressed with the biatrial technique and markedly improved with the bicaval technique of orthotopic heart transplantation. The beneficial effects of the latter technique on atrial function could improve allograft exercise performance.

journal_name

J Am Coll Cardiol

journal_title

Journal of the American College of Cardiology

authors

Freimark D,Silverman JM,Aleksic I,Crues JV,Blanche C,Trento A,Admon D,Queral CA,Harasty DA,Czer LS

doi

10.1016/0735-1097(94)00465-3

subject

Has Abstract

pub_date

1995-03-15 00:00:00

pages

932-6

issue

eissn

0735-1097

issn

1558-3597

pii

0735-1097(94)00465-3

journal_volume

pub_type

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Atrial emptying with orthotopic heart transplantation using bicaval and pulmonary venous anastomoses: a magnetic resonance imaging study.