Archives of the Turkish Society of Cardiology
Left Atrial Mechanical Functions in Patients with Congestive Heart Failure [Turk Kardiyol Dern Ars]
Turk Kardiyol Dern Ars. 2002; 30(3): 172-176

Left Atrial Mechanical Functions in Patients with Congestive Heart Failure

M. Kemal EROL1, Mustafa YILMAZ1, Mahmut AÇIKEL1, Engin BOZKURT1, Hüseyin ŞENOCAK1

Left atrial (LA) mechanical functions have an important role to maintain cardiac output. The aim of the present study was to evaluate LA mechanical functions in patients with severe congestive heart failure (CHF). Sixty-eight patients with NYHA group III or IV CHF, and 15 healthy volunteers as a control group were studied. The etiology of CHF was ischemia in 44 patients (group I), idiopathic dilated cardiomyopathy in 16 patients (group II) and mitral regurgitation in 8 patients (group III). Left atrial volume measurements were done at the time of mitral valve opening (LAVmax), at the onset of atrial systole (p wave at the electrocardiography = LAVp) and closure (LAVmin) according to the biplane area-length method. All volumes were corrected for body surface area and LA emptying functions were calculated. LA passive emptying volume (LAPEV)= LAVmax - LAVp, LA passive emptying fraction (LAPEF)= LAPEV/ LAVmax, Conduit volume (CV)=Left ventricular stroke volume- (LAVmax- LAVmin), LA active emptying volume (LAAEV)= LAVp- LAVmin, LA active emptying fraction (LAAEF)= LAAEV/LAVp, LA total emptying volume (LATEV)= (LAVmax -LAVmin), LA total emptying fraction (LATEF)= LATEV/LAVmax. LAVmax, LAVmin and LAVp were found significantly higher in patients with CHF than in controls (p<0.001). LAPEV was significantly greater in group III than in controls. LAPEF was lower in three groups than in controls (p<0.001). Conduit volume was similar in three groups compared to controls. Although LAAEV was significantly greater in group I p<0.005) and in-group III (p<0.001) than in controls, LAAEV was similar in-group II. LAAEF was significantly lower in patients with CHF than in controls (p<0.05, p<0.005, p<0.005, respectively). LATEV was greater only in-group III than in controls (p<0.001), by contrast LATEV was significantly lower in three groups than in controls (p<0.001). The results of this study suggested that left atrial active and passive emptying fractions are reduced and compensatory contribution does not work in advanced CHF due to mitral regurgitation, ischemic or dilated cardiomyopathy.


How to cite this article
M. Kemal EROL, Mustafa YILMAZ, Mahmut AÇIKEL, Engin BOZKURT, Hüseyin ŞENOCAK. Left Atrial Mechanical Functions in Patients with Congestive Heart Failure. Turk Kardiyol Dern Ars. 2002; 30(3): 172-176
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