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[Prognosis of adult angina pectoris by means of blood pressure and the electrocardiogram].
Pronostic de l'angine de poitrine chez l'homme à l'aide de la pression artérielle et de l'électrocardiogramme.
One hundred and fifty-three men with angina were studied to determine the risk of death over a 5-year period. Multivariate analysis using age, systolic and diastolic pressure, and six electrocardiographic variables (QRS axis, PR interval, the sum of S in V1 and R in V5, T-wave and ST segment anomalies and incomplete left bundle branch block) identified sub-groups having very different prognoses. An analysis using only six variables (omitting diastolic pressure, ST segment anomalies and PR interval) retained a good discriminatory value, and this same discriminant function calculated from half of the sample had good prognostic value in the other half. A prognostic index based on this function (designed to simplify the calculations in clinical use) identified a sub-group (24% of the total group) in which no mortality occurred, while another sub-group (16% of the total group) suffered a mortality of 67%. The logical use of the blood pressure and ECG leads to a more precise prognosis in angina and should help in determining the indications for myocardial revascularisation.
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