Hypertrophic obstructive cardiomyopathy. Assessment by echocardiographic and Doppler ultrasound techniques
Autor: | D R Boughner, J A Persaud, R L Schuld |
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Rok vydání: | 1975 |
Předmět: |
Aortic valve
Adult Male Cardiac output medicine.medical_specialty Adolescent Diastole Obstructive cardiomyopathy Contractility symbols.namesake Heart Rate Internal medicine Mitral valve Heart rate Medicine Humans cardiovascular diseases Cardiac Output Child Ultrasonography Clinical Trials as Topic business.industry Isoproterenol Doppler Effect Cardiomyopathy Hypertrophic Middle Aged Heart Valves Myocardial Contraction medicine.anatomical_structure Echocardiography Aortic Valve Depression Chemical symbols Cardiology cardiovascular system Mitral Valve Female Cardiology and Cardiovascular Medicine business Doppler effect Research Article |
Zdroj: | British heart journal. 37(9) |
ISSN: | 0007-0769 |
Popis: | Hypertrophic obstructive cardiomyopathy is a disease of the myocardium that can be assessed echocardiographic and transcutaneous Doppler ultrasound techniques. Four patients are presented with various patterns of the disease, and the frequently familial incidence is illustrated. The importance of ultrasonic evidence for asymmetric septal hypertrophy in all stages is emphasized and evidence of reduced septal contractility demonstrated. Abnormalities of mitral valve motion, slow diastolic closure rate and systolic anterior movement of the anterior leaflet, are shown in the obstructive form of the disease. Also partial mid-systolic aortic valve closure and aortic cusp flutter are shown with outflow obstruction. The outflow tract gradient can be calculated from mitral valve to septum systolic distances. Transcutaneous Doppler ultrasound shows a normal aortic velocity pattern in nonobstructive disease while consistent abnormalities are present with severe resting obstruction. Isoprenaline can be used to alter the normal velocity pattern associated with a minimal resting gradient to an abnormal pattern indicating the development of significant obstruction. |
Databáze: | OpenAIRE |
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