| Presentation | 2007/1/18 Assessment of Vibration of the Myocardium Using Ultrasound Hiroshi KANAI, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have found a phenomenon that the some pulsive vibration with several tenth hertz is caused by the closure of the aortic valve and it propagates along the heart wall. From the measured frequency dispersion of the propagation speed of the shear wave, we have developed a method to noninvasively determine the myocardial viscoelasticity (IEEE Trans UFFC 2005; 51: 1931), which would be effective in evaluation of minute change in tissue structure due to the heart disease. We have found a similar phenomenon for the radiation time of the first heart sound caused by mitral valve closure. Before the time, we found that the another wave propagates from apical side to base side, which would correspond to the propagation of electrical excitation in myocardium. Since the conduction property of electric excitation differs among the normal, ischemia, and avascular necrosis, the method has a potential for noninvasively evaluation of the myocardium using both of the viscoelasticity and the electrical conductivity. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | heart wall vibration / phased tracking method / viscoelasticity / electric conduction property / ischemia / necrosis |
| Paper # | US2006-100 |
| Date of Issue |
| Conference Information | |
| Committee | US |
|---|---|
| Conference Date | 2007/1/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Ultrasonics (US) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Assessment of Vibration of the Myocardium Using Ultrasound |
| Sub Title (in English) | |
| Keyword(1) | heart wall vibration |
| Keyword(2) | phased tracking method |
| Keyword(3) | viscoelasticity |
| Keyword(4) | electric conduction property |
| Keyword(5) | ischemia |
| Keyword(6) | necrosis |
| 1st Author's Name | Hiroshi KANAI |
| 1st Author's Affiliation | Graduate School of Engineering, Tohoku University() |
| Date | 2007/1/18 |
| Paper # | US2006-100 |
| Volume (vol) | vol.106 |
| Number (no) | 481 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |