[Left ventricular relaxation and filling abnormalities in patients with HOCM and left ventricular pressure overload (author's transl)].
In order to test the hypothesis that delayed mitral valve opening (MO) with regard to endsystolic dimension (t DS-MO) is specific for hypertrophic obstructive cardiomyopathy (HOCM), LV echograms of patients with different forms of LV hypertrophy due to chronic pressure overload (CPO; aortic stenosis + arterial hypertension, n = 24) and hypertrophic obstructive cardiomyopathy (n = 24) were recorded, digitized and compared with those of normals (N :n = 28(. In patients with HOCM (93 +/- 37 ms; p less than 0.0001) and CPO (66 +/- 31 ms; p less than 0.0001) the time t DS-MO was significantly delayed compared with N (13 +/- 15 MS), due to abnormal relaxation. This prolonged relaxation time resulted in an abnormal diameter increase (delta D) during the isovolumic relaxation phase (HOCM: 4.0 +/- 2.2 MM/CPO: 3.0 +/- 1.8 mm; p less than 0.0001/N:0.6 +/- 0.5 mm) and the rapid filling phase (HOCM 7.6 +/- 2.7 mm; p less than 0.0001/CPO 9.2 +/- 2.9 mm; p less than 0.05 / N: 10.7 +/- 2.2 mm). The echocardiographical signs of an abnormal relaxation are not specific for HOCM, they can be seen in different forms of secondary LV hypertrophy and are accompanied by changes in the diastolic filling pattern.
D000293:Adolescent; D000328:Adult; D001024:Aortic Valve Stenosis / Q000150:complications; D006332:Cardiomegaly / Q000209:etiology / Q000503:physiopathology*; D009202:Cardiomyopathies / Q000150:complications / Q000503:physiopathology*; D004452:Echocardiography; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D006973:Hypertension / Q000150:complications; D008297:Male; D008875:Middle Aged
Abnormes Relaxations- und Füllverhalten des linken Ventrikels bei unterschiedlichen Hypertrophieformen.