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Impairment of left ventricular diastolic function during coronary artery bypass grafting
D R Wehlage1, H Böhrer, K Ruffmann
1Department of Anaesthesia, University of Heidelberg, FRG.
Insights
Coronary artery bypass grafting surgery impairs left ventricular diastolic function. Diastolic filling decreased significantly, while atrial contraction
Area of Science:
- Cardiology
- Cardiac Surgery
- Echocardiography
Background:
- Diastolic dysfunction can impact cardiac outcomes.
- Understanding perioperative cardiac function is crucial for patient management.
Purpose of the Study:
- To evaluate left ventricular diastolic function during coronary artery bypass grafting (CABG).
Main Methods:
- Transesophageal Doppler echocardiography was used in 12 patients.
- Hemodynamic and Doppler-derived variables were measured pre- and post-sternal closure.
Main Results:
- Early diastolic filling of the left ventricle decreased from 55% to 35%.
- The contribution of atrial contraction to left ventricular filling increased from 41% to 62% (p < 0.001).
Conclusions:
- Coronary artery bypass grafting surgery leads to impaired diastolic function.
- Changes suggest a significant impact on the heart's ability to relax and fill during diastole.
Abstract:
Twelve patients were studied by transoesophageal Doppler echocardiography to determine diastolic function during coronary artery bypass grafting. Haemodynamic and Doppler-derived variables were measured after induction of anaesthesia and after closure of the sternum. Early diastolic filling of the left ventricle decreased from 55% to 35% during surgery. The contribution of atrial contraction to left ventricular filling increased from 41% to 62% (p less than 0.001). We conclude that coronary artery bypass grafting results in impairment of diastolic function during the operation.