Radionuclide angiography in evaluation of left ventricular function following aortic valve replacement
Congestive heart failure in patients surviving aortic valve replacement has been associated with a high late mortality. To determine whether myocardial dysfunction in these patients occurred preoperatively, perioperatively, or during the early postoperative period, 19 consecutive patients undergoing aortic valve replacement using cardioplegia and hypothermia were studied by multiple-gated cardiac blood pool imaging. The resting ejection fractions for 8 patients with aortic stenosis did not show significant changes following operation. The 11 patients with aortic insufficiency has resting preoperative values of 58 +/- 15%, which fell to 38 +/- 18% immediately postoperatively (p less than 0.01), with the late values being 51 +/- 16%. Eight of 18 patients (44%) showed deterioration of regional wall motion immediately after operation, which persisted in 3 during the late evaluation. The occurrence of new perioperative regional wall motion abnormalities and persistent perioperative depression in left ventricular function in some patients suggest the need for further improvement in myocardial protection during cardiopulmonary bypass for aortic valve replacement.
- Research Organization:
- Univ. of Michigan, Ann Arbor
- OSTI ID:
- 5764396
- Journal Information:
- Ann. Thorac. Surg.; (United States), Vol. 31:5
- Country of Publication:
- United States
- Language:
- English
Similar Records
Radionuclide assessment of left ventricular function in patients requiring intraoperative balloon pump assistance
Changes in left ventricular performance related to perioperative myocardial infarction in coronary artery bypass graft surgery
Related Subjects
59 BASIC BIOLOGICAL SCIENCES
AORTA
SCINTISCANNING
HEART FAILURE
DIAGNOSIS
MYOCARDIUM
LABELLED POOL TECHNIQUES
PATHOLOGY
PATIENTS
SURGERY
ARTERIES
BLOOD VESSELS
BODY
CARDIOVASCULAR SYSTEM
COUNTING TECHNIQUES
DIAGNOSTIC TECHNIQUES
HEART
ISOTOPE APPLICATIONS
MEDICINE
MUSCLES
ORGANS
RADIOISOTOPE SCANNING
SYMPTOMS
TRACER TECHNIQUES
550601* - Medicine- Unsealed Radionuclides in Diagnostics
551001 - Physiological Systems- Tracer Techniques