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October 1, 1972Scottish Medical Journal

M-Complex: The Electrocardiographic Sign of Impending Cardiac Rupture following Myocardial Infarction

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Why the study?

Does a progressive increase in the elevated R-ST segment of the M-complex predict impending cardiac rupture in patients with acute myocardial infarction?

Population

284 patients admitted to the Coronary-Care Unit, including 60 patients with an acute monophasic injury…

Comparison

Progressive increase in the elevated R-ST… vs Patients without this progressive ECG change

Design

Cohort

Follow-up

1 day

Authors

MMM. Afzal Mir

Discussion

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Implication

May flag rupture risk in hypertensive AMI with prolonged pain; hypothesis-generating and needs prospective validation before practice change.

Structured PICO

Does a progressive increase in the elevated R-ST segment of the M-complex predict impending cardiac rupture in patients with acute myocardial infarction?

P
Population
284 patients admitted to the Coronary-Care Unit, including 60 patients with an acute monophasic injury pattern (M-Complex) on initial ECG, of whom 6 died on the first day of myocardial infarction (3 with cardiac rupture, 3 without).
I
Intervention
Progressive increase in the elevated R-ST segment of the M-complex with an upward 'pull' of the R-ST junction on ECG
C
Comparator
Patients without this progressive ECG change (non-rupture fatalities)
O
Outcome
Cardiac rupturehard clinical

A progressive increase in the elevated R-ST segment of the M-complex on ECG serves as a critical warning sign for impending cardiac rupture in acute myocardial infarction patients with persistent hypertension.

Cite This Study

M. Afzal Mir (1972) studied this question.

synapsesocial.com/papers/6a7caa48c9ba99be288ce620https://doi.org/10.1177/003693307201701002
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Also Consider

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  1. 1RUPTURE OF THE HEART IN MYOCARDIAL INFARCTION. EXPERIENCE IN A LARGE GENERAL HOSPITAL1944 · 47 citations
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  4. 4Ventricular Arrhythmias and K+ Transfer during Myocardial Ischemia and Intervention with Procaine Amide, Insulin, or Glucose Solution*1967 · 120 citations
  5. 5Electrocardiogram during cardiac rupture by myocardial infarction1970 · 35 citations