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The incidence of myocardial bridges in heart transplants
P Wymore1, J W Yedlicka, V Garcia-Medina
1Department of Diagnostic Radiology, University of Minnesota Hospital, Minneapolis 55455.
Insights
Myocardial bridges were found in 33% of heart transplant patients, a higher incidence than previously reported. This finding may be linked to increased myocardial stiffness and hypertrophy in transplanted hearts.
Area of Science:
- Cardiology
- Cardiac Surgery
- Transplantation Medicine
Background:
- Myocardial bridges are congenital anomalies where a segment of the coronary artery courses through the heart muscle.
- Their clinical significance and incidence in specific patient populations are areas of ongoing research.
Purpose of the Study:
- To determine the incidence of myocardial bridges in patients who have undergone heart transplantation.
- To explore potential reasons for observed incidence rates in this unique cohort.
Main Methods:
- Retrospective review of coronary angiograms from 64 heart transplant recipients.
- Analysis focused on identifying myocardial bridges, particularly their location and characteristics.
Main Results:
- Myocardial bridges were detected in 33% of the reviewed heart transplant patients.
- The bridges were predominantly observed in the mid-portion of the left anterior descending coronary artery.
- The observed incidence is higher than typically reported in general populations.
Conclusions:
- The incidence of myocardial bridges is notably higher in heart transplant recipients compared to previous literature.
- Increased myocardial stiffness and hypertrophy in transplanted hearts may enhance the angiographic visualization of myocardial bridges.
Abstract:
Coronary angiograms of 64 heart transplant patients were reviewed to determine the incidence of myocardial bridges. In 33% of the patients, myocardial bridges were detected, almost exclusively across the midportion of the left anterior descending coronary artery. The incidence is higher than previously reported in the literature and is thought to be related to increased stiffness and hypertrophy of the myocardium, which facilitates angiographic detection of myocardial bridges in the transplanted heart.