Anatomic M-mode echocardiography: A new approach to assess regional myocardial function--A comparative in vivo and in vitro study of both fundamental and second harmonic imaging modes. |
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| Authors: | J M Strotmann J P Escobar Kvitting U M Wilkenshoff B Wranne L Hatle G R Sutherland |
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| Institution: | 1. Physical Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Room M7-510, M4N 3M5, Toronto, ON, Canada;2. Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada;3. Schulich Heart Research Program, Sunnybrook Health Sciences Centre, Toronto, ON, Canada;4. The Toronto Centre for Phenogenomics, Mount Sinai Hospital, Toronto, ON, Canada;1. Department of Cardiology, Angiology and Pneumology, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany;2. DZHK (German Centre for Cardiovascular Research), partner site Heidelberg, Germany;1. Department of Diagnostic and Interventional Radiology, University of Tübingen, Germany;2. Department of Internal Medicine III, Cardiology and Cardiovascular Medicine, University of Tübingen, Germany;1. University Paris-Sud CNRS, Université Paris-Saclay, Villejuif, France;2. Gustave Roussy, Villejuif, France |
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| Abstract: | OBJECTIVE: To evaluate the accuracy of anatomic M-mode echocardiography (AMM). METHODS: Eight phantoms were rotated on a device at different insonation depths (IDs) in a water beaker. They were insonated with different transducer frequencies in fundamental imaging (FI) and second harmonic imaging (SHI), and the diameters were assessed with conventional M-mode echocardiography (CMM) and AMM with the applied angle correction (AC) after rotation. In addition, left ventricular wall dimensions were measured with CMM and AMM in FI and SHI in 10 volunteers. RESULTS: AC had the greatest effect on the measurement error in AMM followed by ID (AC: R2 = 0. 295, ID: R2 = 0.268; P <.0001). SHI improved the accuracy, and a difference no longer existed between CMM and AMM with an AC up to 60 degrees. In vivo the limit of agreement between AMM and CMM was -1.7 to +1.8 mm in SHI. CONCLUSION: Within its limitations (AC < 60 degrees; ID < 20 cm), AMM could be a robust tool in clinical practice. |
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