Single right-sided precordial lead in the diagnosis of right ventricular involvement in inferior myocardial infarction

Am Heart J. 1976 May;91(5):571-6. doi: 10.1016/s0002-8703(76)80141-x.


The ST segment in a single right-sided chest lead, CR4R, has been studied in 92 consecutive patients with acute inferior transmural left ventricular myocardial infarction. A transient ST- segment rise of more than 1 mm. was recorded in 35 patients, and strongly indicated a significant extension of the infarction to the posterior free right ventricular wall according to autopsy findings. This ECG pattern was furthermore associated with right-sided heart failure, hypotension and oliguria. Left heart failure was also common. The short-term prognosis of patients with ST-segment elevation in CR4R was poor.

MeSH terms

  • Aged
  • Electrocardiography*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Myocardial Infarction / diagnosis*