The effects of Valsalva maneuver on global and segmental left ventricular function in presence and absence of coronary artery disease
| Autor: | Harold L. Kennedy, Gerald Mudd, Arthur J. Labovitz, Bulent Dincer, Umit T. Aker |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
Adult
Male medicine.medical_specialty Valsalva Maneuver Heart Ventricles medicine.medical_treatment Hemodynamics Coronary Disease Coronary artery disease Internal medicine medicine Valsalva maneuver Humans Aged Ejection fraction Ventricular function business.industry Stroke Volume Stroke volume Middle Aged medicine.disease Myocardial Contraction medicine.anatomical_structure Coronary vessel Cardiology Female Cardiology and Cardiovascular Medicine business Artery |
| Zdroj: | American Heart Journal. 109:259-264 |
| ISSN: | 0002-8703 |
| Popis: | To determine the effects of the Valsalva maneuver on global and regional left ventricular function, single-plane left ventriculograms were performed in the 30-degree right anterior oblique projection in 50 patients during normal breath holding and during the late strain phase of the Valsalva maneuver. Thirty-one patients had significant coronary artery disease (greater than 70% luminal narrowing in a major coronary artery). Ventriculograms were analyzed for determination of ejection fraction, end-diastolic, and end-systolic volumes. Regional wall motion was analyzed by a chord method of calculating segmental fractional shortening. Ejection fraction increased significantly in the entire group of patients (62 +/- 16% to 70 +/- 19%, p less than 0.0001), while both end-diastolic (105 +/- 33 cc to 88 +/- 34 cc, p less than 0.0001) and end-systolic volumes (43 +/- 29 cc to 30 +/- 29 cc, p less than 0.0001) showed striking reductions with Valsalva maneuver. Patients without significant coronary disease usually exhibited global augmentation in left ventricular function, while those with coronary disease often exhibited only segmental improvement. This augmentation appeared to be dependent on the patency of the supplying coronary vessel. |
| Databáze: | OpenAIRE |
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