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M Salvatore

Publications and source records attributed to M Salvatore.

353 records · Page 20Linked to original sources
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[Evaluation of systolic parietal thickening of the left ventricle using technetium-99m methoxy isobutyl isonitrile. Relationship with coronary anatomy].

Forty-three patients (40 men and 3 women, mean age 54 +/- 9 years) with coronary artery disease underwent 99mTc methoxy isobutyl isonitrile (sestamibi) myocardial scintigraphy and coronary arteriography. Sestamibi uptake and wall thickening index (WTI) were quantitatively evaluated in each myocardial segment. Segments were divided into group 1 (normal coronary arteries, no. = 94), group 2 (coronary artery stenosis 50-99%, no. = 79), and group 3 (coronary artery stenosis 100%, no. = 42). Group 3 segments were subdivided into group 3A (with collaterals, no. = 18) and group 3B (without collaterals, no. = 24) segments. Both sestamibi uptake and WTI were significantly lower (p < 0.01) in group 3 than in groups 1 and 2. However, only WTI was significantly reduced (p < 0.01) in group 3B vs group 3A. Diagnostic capabilities (i.e. identification of segments supplied by stenosed coronary arteries) of sestamibi uptake, WTI, and a combination of both variables with a discriminant function were compared by analysis of receiver operator characteristic curve (ROC) areas. The diagnostic capabilities of sestamibi uptake (ROC area = 0.65 +/- 0.04) were significantly lower (p < 0.05) than those of WTI (ROC area = 0.81 +/- 0.03) and discriminant function (ROC area = 0.83 +/- 0.03). In conclusion, our data suggest that combined analysis of myocardial perfusion and regional ventricular function may increase the diagnostic accuracy of sestamibi myocardial scintigraphy in identifying myocardial segments supplied by stenosed coronary arteries.

Cardiomegaly↗
PubMedDate not supplied

[Effects left ventricle asynchrony on systolic and diastolic function in patients with non-ischemic heart failure].

INTRODUCTION: The asynchrony of the left ventricle--i.e., its nonuniform contraction and relaxation--is an important factor for left ventricular function. Heart failure is often related to abnormal systolic function, sometimes associated with a diastolic dysfunction. We studied the relationship of left ventricular asynchrony to left ventricular function in patients with nonischemic heart failure. MATERIAL AND METHODS: Radionuclide angiography at rest was performed in 25 patients with nonischemic heart failure and in 26 age and sex matched normal subjects. In addition to ejection fraction and peak filling rate, two indices of left ventricular asynchrony were calculated: the coefficient of variation of regional time to end systole and the coefficient of variation of regional time to peak filling rate. These factors indicate how disperse are the regional values of time to end systole and of time to peak filling rate. In fact, the higher the value, the greater the asynchrony. RESULTS: A significant (r = .46, p < .05) inverse correlation was found between the ejection fraction and the coefficient of variation of regional time to end systole in both the normal subjects and the heart failure patients, while the ejection fraction correlated significantly (r = .46, p < .05) with the coefficient of variation of regional time to peak filling rate only in the patients. Moreover, the peak filling rate was inversely correlated (r = .57, p < .05) with the coefficient of variation of regional time to peak filling rate in the heart failure patients but not in the normal subjects. CONCLUSIONS: These results suggest that left ventricular systolic and diastolic asynchrony may contribute to impair left ventricular systolic and diastolic function in patients with nonischemic heart failure.

Adult↗