Diagnostic accuracy of continuous wave doppler echocardiography in severe aortic stenosis in the elderly
| Autor: | Masao Nitta, Herbert N. Hultgren, Toshihiko Takamoto, Koichi Taniguchi |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
Adult
Male Aortic valve Cardiac Catheterization Cardiac output medicine.medical_specialty medicine.medical_treatment Hemodynamics Doppler echocardiography symbols.namesake Heart Rate Internal medicine Pressure Humans Medicine Cardiac Output Aged Cardiac catheterization Aged 80 and over medicine.diagnostic_test business.industry Phonocardiography Stroke Volume Aortic Valve Stenosis Stroke volume Middle Aged medicine.disease Stenosis medicine.anatomical_structure Echocardiography Aortic Valve cardiovascular system symbols Cardiology Cardiology and Cardiovascular Medicine business Doppler effect |
| Zdroj: | Japanese Heart Journal. 29:169-178 |
| ISSN: | 1348-673X 0021-4868 |
| DOI: | 10.1536/ihj.29.169 |
| Popis: | Forty-four male patients (mean age 63.6 years) with aortic stenosis (AS) were evaluated by conventional hemodynamic methods and continuous wave (CW) Doppler echocardiography. The relationship between Doppler mean gradients and direct mean pressure gradients in all patients was significant, with an r value of 0.88. Sixteen of 17 patients with a mean Doppler gradient greater than or equal to 40 mmHg had severe AS (AVA less than or equal to 1.0 cm2). Twenty-seven patients had a Doppler gradient less than 40 mmHg, and 8 of these patients had severe AS (AVA less than or equal to 1.0 cm2). The sensitivity and specificity of a Doppler gradient greater than or equal to 40 mmHg in detecting severe AS were, therefore, 67% and 95%, respectively. Thirty-three percent (8/24) of patients with severe AS and low Doppler gradients (less than 40 mmHg) had evidence of poor left ventricular function, evidenced by a lower cardiac output, a higher heart rate and an abnormal PEP/LVET ratio compared to the other patients. Thus, the presence of a low stroke volume less than or equal to 60 ml/beat and PEP/LVET x HR greater than 26 is of value in identifying patients where the Doppler is likely to significantly underestimate the degree of aortic stenosis. |
| Databáze: | OpenAIRE |
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