The S wave in acute anterior Q‐wave myocardial infarction: A study with serial multilead precordial maps and standard ECGs

John E. Madias

Research output: Contribution to journalArticlepeer-review

Abstract

To investigate the relationship of S waves with R waves and/or Q waves in the ECGs of patients with acute myocardial infarction, 20 patients with anterior Q‐wave infarcts had serial 49‐lead precordial maps and simultaneously recorded standard ECGs on admission and at 13 predetermined time intervals, extending to their discharge from the hospital. The sums of S waves (ΣS) from ECG leads of both precordial maps and standard ECGs showing ST‐segment elevation on admission were correlated with the corresponding sums of R waves ($$R) and/or Q waves ($$Q). Correlation of $$S by the precordial maps and the $$S by the standard ECG was good (r=0.88). However, correlation of $$S with $$R and $$Q by both the precordial maps and standard ECG were poor (r values ranged between –0.02 and –0.32). Fair correlations were found between $$S + $$Q and the corresponding $$R by both ECG systems (r=–0.36, precordial map and r= –0.40, standard ECG). The present study demonstrates (1) that precordial (consequently partial) ECG mapping systems have no advantage over standard precordial ECG, and (2) that quantitative data from S waves correlate weakly with similar information from corresponding R waves or Q waves, but fairly with the latter two combined, as recorded by the two ECG systems employed.

Original languageEnglish
Pages (from-to)380-385
Number of pages6
JournalClinical Cardiology
Volume14
Issue number5
DOIs
StatePublished - May 1991
Externally publishedYes

Keywords

  • ECG
  • Q wave
  • Q wave MI
  • R wave
  • S wave
  • anterior MI
  • myocardial infarction
  • precordial ECG maps

Fingerprint

Dive into the research topics of 'The S wave in acute anterior Q‐wave myocardial infarction: A study with serial multilead precordial maps and standard ECGs'. Together they form a unique fingerprint.

Cite this