Echocardiographic profile of the transplanted human heart in clinically well recipients

Area of Science:

• Cardiology
• Transplantation Medicine
• Cardiac Imaging

Background:

• Heart transplantation is a life-saving procedure for end-stage heart failure.
• Long-term cardiac adaptation and potential remodeling post-transplant require thorough investigation.
• Assessing graft health and function is crucial for patient outcomes.

Purpose of the Study:

• To evaluate cardiac structure and function in clinically well heart transplant recipients one year after transplantation.
• To compare echocardiographic parameters in heart transplant recipients with age-matched control groups.
• To identify subclinical cardiac remodeling in successful heart transplant patients.

Main Methods:

• Echocardiographic study of 34 heart transplant recipients (21-60 years) at 12 +/- 2 months post-transplant.
• Exclusion of rejection via normal stress thallium scintigraphy, radionuclide ventriculography, and recent endomyocardial biopsy.
• Comparison with two control groups: 15 donor-age matched and 15 recipient-age matched normal subjects.

Main Results:

• Significantly increased left ventricular mass (p < 0.001) in recipients versus controls.
• Normal left ventricular volumes and ejection fractions in transplanted hearts.
• Significantly increased right ventricular diastolic wall thickness and chamber area (p < 0.001), with normal fractional area change.
• Markedly increased left and right atrial areas (p < 0.001) in transplant recipients.

Conclusions:

• Clinically well heart transplant recipients exhibit significant cardiac remodeling one year post-transplant.
• Remodeling includes increased left ventricular mass, right ventricular dilation, and atrial enlargement.
• Despite structural changes, systolic function (ejection fraction, fractional area change) remains preserved in these well-selected patients.