Sp. Karwatowski et al., MITRAL-VALVE FLOW MEASURED WITH CINE MR VELOCITY MAPPING IN PATIENTS WITH ISCHEMIC-HEART-DISEASE - COMPARISON WITH DOPPLER-ECHOCARDIOGRAPHY, Journal of magnetic resonance imaging, 5(1), 1995, pp. 89-92
Diastolic function is an important element of overall left ventricular
function, The pattern of flow across the mitral valve is commonly use
d as a measure of diastolic ventricular function, Magnetic resonance (
MR) velocity mapping of blood flow across the mitral valve was compare
d with Doppler echocardiography. Nineteen patients with known coronary
artery disease (mean age, 62 years; ii with previous myocardial infar
ction) were studied, The mean value of peak early filling velocity (+/
- standard deviation) was 60.1 cm/sec +/- 14.3 with the MR method and
59.4 cm/sec +/- 13.7 with echocardiography (P =.732), The mean differe
nce between the two measurements (95% confidence interval) was -0.8 cm
/sec (-5.2 cm/sec, +2.2 cm/sec), The mean value of early deceleration
was 4.3 m/sec(2) +/- 1.5 with the MR method and 4.0 m/sec(2) +/- 1.5 w
ith echocardiography (P =.073), The mean difference was -0.4 cm/sec(2)
(-0.92 cm/sec(2), +0.05 cm/sec(2)), The mean value of peak atriosysto
lic velocity was 51 cm/sec +/- 14.6 with the MR method and 62 cm/sec /- 17.2 with echocardiography (P =.002). The mean difference was -11 c
m/sec (-18.1 cm/sec, -3.45 cm/sec), Peak atrial filling was consistent
ly lower with the MR method than with echocardiography. Time-averaged
measurements of ventricular filling with MR velocity mapping are an ac
curate measure of early diastolic filling but underestimate the veloci
ty of atriosystolic filling.