Predominant inner-half wall thickening of left ventricle is attenuated in dilated cardiomyopathy: an application of tissue Doppler tracking technique
| Autor: | Yasuaki Tomochika, Nobuo Yamazaki, Shiro Ono, Takashi Tone, Kazuya Murata, Masunori Matsuzaki, Nobuaki Tanaka, Tetsuya Kawagishi |
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| Rok vydání: | 2001 |
| Předmět: |
Adult
Cardiomyopathy Dilated medicine.medical_specialty business.industry Systole Heart Ventricles Healthy subjects Human heart Dilated cardiomyopathy Middle Aged medicine.disease Echocardiography Doppler symbols.namesake medicine.anatomical_structure Ventricle Internal medicine medicine symbols Cardiology Humans Radiology Nuclear Medicine and imaging Thickening Cardiology and Cardiovascular Medicine business Doppler effect |
| Zdroj: | Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography. 14(2) |
| ISSN: | 0894-7317 |
| Popis: | The importance of the inner half (IH) of the left ventricular (LV) wall has been reported in hearts that contract normally. However, it is difficult to verify this fact in an in vivo human heart with clinical echocardiography. By using a recently developed tissue Doppler tracking technique, we could assess the systolic wall thickening of the IH and outer half (OH) of the LV wall in 11 normal and 7 dilated cardiomyopathic hearts. Percent wall thickening and the fractional contribution of the IH and OH to the transmural wall thickening were calculated. In healthy subjects, percent wall thickening of the IH, OH, and transmural wall of the left ventricle were 75.8% +/- 24.1%, 39.4% +/- 14.4% (P.001 versus IH), and 57.6% +/- 17.6%, respectively. In patients with dilated cardiomyopathy, those values were 31.3% +/- 17.1%, 31.2% +/- 20.1% (not significant versus IH), and 31.2% +/- 16.5%, respectively. On the other hand, the fractional contributions of the IH and OH were 66.2% +/- 7.7% and 33.8% +/- 7.7% (Plt.01 versus IH) in healthy subjects and 50.5% +/- 11.8% and 49.5% +/- 11.8% (not significant versus IH) in patients with dilated cardiomyopathy. Specifically, the IH contributed to the transmural wall thickening nearly twice as much as the OH did in healthy subjects, however, the predominance of IH contribution was attenuated in dilated cardiomyopathy. The tissue Doppler tracking technique is useful in assessing the IH and OH LV wall thickening separately in the clinical situation. |
| Databáze: | OpenAIRE |
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