In Case 3 described above the strain pattern developed during a period of critical coronary-artery inadequacy. Subsequently, after all pain had disappeared, the electrocardiogram became normal.

In the new analysis, the 265 patients who developed HF over an average of 4.7 years had shown a 26.4% rate of ECG strain at baseline, as compared with 10.1% of the 8431 remaining patients in the ...