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Duchateau J.,Unite des cardiopathies valvulaires et laboratoire dechocardiographie | Cornolle C.,Unite des cardiopathies valvulaires et laboratoire dechocardiographie | Peyrou J.,Unite des cardiopathies valvulaires et laboratoire dechocardiographie | Ritter P.,Unite des cardiopathies valvulaires et laboratoire dechocardiographie | And 5 more authors.
Ultrasound in Medicine and Biology | Year: 2015

The aim of this study was to compare left ventricular contraction sequence in patients with hypertrophic cardiomyopathy (HCM) and healthy controls. Normal left ventricular contraction sequence in healthy controls exhibits an apex-to-base delay (ABD) contributing to efficient cardiac mechanics (physiologic asynchrony). Echocardiographic data from 20 controls and 40 HCM patients were prospectively analyzed. Endocardial longitudinal and circumferential strains and ABD were measured using custom-built software. HCM patients had increased circumferential (-36.4 ± 6.0 vs. -32.9 ± 5.0, p < 0.01) and decreased longitudinal (-19.3 ± 6.4 vs. -23.4 ± 5.7, p < 0.01) strains. In controls, physiologic ABD was observed (35.7 ± 18.1 ms). This delay was reduced in HCM patients (5.5 ± 22.7 ms, p < 0.01 vs. controls). There was no interaction between ABD and common clinical or echocardiographic parameters in the HCM population. Left ventricular contraction sequence can be modified in HCM patients, with the loss of the physiologic ABD. This phenomenon is independent from commonly measured parameters. © 2015 World Federation for Ultrasound in Medicine & Biology. Source

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