title: Assessment of reflection pulse wave in patients with cardiomyopathy: evaluation of noninvasive measurement of wave intensity.
abstract: OBJECTIVE
  We assessed the reflection pressure wave using noninvasive measurement of wave intensity (WI) in patients with cardiomyopathy.
  
  
  RESULTS
  Subjects included 8 patients with hypertrophic cardiomyopathy (HCM group) and 10 patients with dilated cardiomyopathy (DCM group). Twelve healthy subjects were used as a control group. By using a combined Doppler and echo-tracking system, changes in vascular diameter (dD) and blood flow velocity (dV) were recorded simultaneously at the common carotid artery and dD x dV was measured as WI. In the components of WI, the positive component of early systolic phase (FE) and the negative component following FE (B) were significantly reduced in the DCM group. There was a significant positive correlation between FE and B in all 3 groups. The appearance time of B was significantly shorter in the HCM group and significantly longer in the DCM group compared with the control group.
  
  
  CONCLUSIONS
  It was suggested that the value of the reflection pressure wave was influenced by the left ventricular contractility, and that the effect of the reflection pressure wave appeared earlier in patients with HCM and later in patients with DCM compared with the control subjects.
authors.affiliation: Department of Internal Medicine St Marianna University School of Medicine, Kawasaki, Kanagawa, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Nobuoka
authors.forename: J
authors.initials: J
authors.lastname: Aono
authors.forename: J
authors.initials: J
authors.lastname: Nagashima
authors.forename: H
authors.initials: H
authors.lastname: Ando
authors.forename: H
authors.initials: H
authors.lastname: Adachi
authors.forename: Y
authors.initials: Y
authors.lastname: Imai
authors.forename: M
authors.initials: M
authors.lastname: Shibamoto
authors.forename: H
authors.initials: H
authors.lastname: Tanaka
authors.forename: F
authors.initials: F
authors.lastname: Miyake
authors.forename: M
authors.initials: M
authors.lastname: Murayama
mesh_terms: D001783:Blood Flow Velocity; D002311:Cardiomyopathy, Dilated / Q000503:physiopathology*; D002312:Cardiomyopathy, Hypertrophic / Q000503:physiopathology*; D016022:Case-Control Studies; D003326:Coronary Circulation; D015150:Echocardiography, Doppler; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D012044:Regression Analysis