The Authors' reply: instantaneous pressure-flow relationships in aortic stenosis
| Autor: | Haotian Gu, David E. Newby, Marc R. Dweck, Rong Bing, Phil Chowienczyk |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_specialty
business.industry Stroke Volume Aortic Valve Stenosis 030204 cardiovascular system & hematology medicine.disease Prognosis End systole 03 medical and health sciences QRS complex Stenosis 0302 clinical medicine Flow (mathematics) Echocardiography Internal medicine cardiovascular system Cardiology Medicine Ventricular volume Humans 030212 general & internal medicine Cardiology and Cardiovascular Medicine business |
| Zdroj: | Heart (British Cardiac Society). 106(22) |
| ISSN: | 1468-201X |
| Popis: | The Authors’ reply We thank Professor Otto and Dr Bermejo for their interest and astute comments regarding our study.1 The echo frame for determining left ventricular volume at peak aortic velocity is estimated by the measuring the total number of frames from the R wave to the end systole and multiplying this by the fraction of time from the R wave to the peak aortic velocity and from the R wave to the end systole. In the initial report of EF1 in aortic stenosis (AS),2 the intraobserver and interobserver coefficients of variation were 6.7% and 9.8%. We acknowledge that EF1 … |
| Databáze: | OpenAIRE |
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