[Evaluation of pulmonary venous flow patterns in left heart failure: a study using transesophageal Doppler echocardiography].
Pulmonary venous flow (PVF) patterns in left heart failure were evaluated using transesophageal pulsed Doppler echocardiography in 30 patients with dilated hearts (DH) and 30 normal subjects. Eighteen patients had myocardial infarction and 12 patients had dilated cardiomyopathy. The diagnostic criteria by using M-mode echocardiography were left ventricular end-diastolic dimensions (LVDd) of 5.5 cm or more and % LV fractional shortening (%FS) of less than 30%. Peak velocities of the first systolic (PVS1) and second systolic (PVS2) forward waves of PVF, %FS and total amplitude of mitral annular motion in the patient group were significantly decreased compared with the normal group. However, there were no differences in these parameters between the 22 patients (DH-1 group) with a mean pulmonary capillary wedge pressure (PCWP) of less than 18 mmHg and 8 patients (DH-2 group) with a PCWP of 18 mmHg or greater. Peak velocities of the diastolic forward wave of PVF and the early diastolic wave (D) of the LV inflow velocity in the DH-1 group were significantly decreased, and the peak velocity of the atrial contraction wave (A) of the LV inflow velocity was increased compared with those of the normal group. D of the LV inflow velocity, peak velocity of the diastolic forward wave, and peak velocity of the atrial systolic backward wave of the PVF in the DH-2 group were significantly increased compared with those of the DH-1 group. Significant positive correlations were observed between peak velocity of the diastolic forward wave and D or PCWP in the patient group, but the latter relationship was not linear. The A/D ratio of the LV inflow velocity was significantly decreased, and the ratio of the amplitudes of atrial contraction wave to total vertical deflection on the apexcardiogram of the DH-2 group were significantly increased compared with those of the DH-1 group. A patient with extensive myocardial infarction associated with development of severe LV dysfunction (PCWP = 23 mmHg) and a "pseudonormalization" pattern of LV inflow velocity demonstrated markedly increased peak velocities of the diastolic and atrial systolic forward wave, and decreased PVS2. However, the peak velocities of the diastolic and atrial systolic forward wave were decreased, and that of PVS2 was increased with fair improvement of LV dysfunction (PCWP = 10 mmHg) and with compensatory augmentation of the atrial contraction wave A of LV inflow velocity.(ABSTRACT TRUNCATED AT 400 WORDS)
Ogawa
S
S
Second Department of Internal Medicine, School of Medicine, University of Tokushima.
Oki
T
T
Iuchi
A
A
Hosoi
K
K
Fujimoto
T
T
Kiyoshige
K
K
Tabata
T
T
Tanimoto
M
M
Fukuda
K
K
Fukuda
N
N
D002311:Cardiomyopathy, Dilated / Q000150:complications; D015150:Echocardiography, Doppler; D017548:Echocardiography, Transesophageal; D006333:Heart Failure / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications; D011667:Pulmonary Veins / Q000503:physiopathology*; D011669:Pulmonary Wedge Pressure / Q000502:physiology; D016277:Ventricular Function, Left / Q000502:physiology