RT Journal Article SR Electronic T1 Electrocardiographic changes produced by interventricular septal rupture. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1098 OP 1100 DO 10.1136/hrt.38.10.1098 VO 38 IS 10 A1 Kerr, F A1 Haywood, L J YR 1976 UL http://heart.bmj.com/content/38/10/1098.abstract AB The electrocardiogram was recorded during spontaneous rupture of the interventricular septum in a patient after myocardial infarction. The electrocardiographic abnormalities included an increase in the sinus rate, elevation of the ST segment, decrease in Q wave size, and increase in the height and width of the P wave.