Reciprocal ST change in acute myocardial infarction: Assessment by electrocardiography and echocardiography

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Abstract

To evaluate the incidence, time course and significance of reciprocal change, 25 consecutive patients admitted with their first acute transmural myocardial infarction were studied with serial electrocardiography and two-dimensional echocardiography. Reciprocal change was noted in all patients with inferior infarction (mean maximal ST segment depression 3.53 ± 1.97 mm) and 70% of patients with anterior infarction (mean maximal ST depression 1.45 ± 0.8 mm, p = 0.001). When initially present, reciprocal change had resolved within 24 hours in 59% of patients. The sum of reciprocal ST depression correlated with the sum of ST elevation in anterior (r = 0.92, p <0.001) and inferior (r = 0.55, p = 0.035) infarction, and this relation persisted when maximal ST depression and elevation were considered. Echocardiographic evidence of contraction abnormalities in areas of the left ventricle remote from the infarction was seen in 45% of patients. However, its presence did not correlate with the presence of reciprocal change. Although reciprocal change progressively diminished on serial electrocardiograms (maximal ST depression 2.73 ± 1.77 mm at 19 hours after onset of symptoms; 1.0 ± 0.92 mm at 2 to 3 days; and 0.22 ± 0.26 mm at 7 to 10 days; p <0.05), the corresponding serial echocardiograms showed no change in the function of the remote wall (remote wall motion index 1.87 ± 0.65, 1.81 ± 0.62, 1.86 ± 0.47, respectively, p = NS). These data, therefore, do not support the hypothesis that reciprocal ST depressions during early acute transmural myocardial infarction reflect remote ischemia. Rather, these changes are influenced by factors determining the degree of acute ST elevation, previously shown to include infarct size, shape, location, transmurality and duration.

Original languageEnglish (US)
Pages (from-to)251-257
Number of pages7
JournalJournal of the American College of Cardiology
Volume2
Issue number2
DOIs
StatePublished - 1983

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Echocardiography
Electrocardiography
Myocardial Infarction
Infarction
Heart Ventricles
Ischemia
Incidence

ASJC Scopus subject areas

  • Nursing(all)

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@article{adb8a5e5145a4a7cbf5f1c2dfc098699,
title = "Reciprocal ST change in acute myocardial infarction: Assessment by electrocardiography and echocardiography",
abstract = "To evaluate the incidence, time course and significance of reciprocal change, 25 consecutive patients admitted with their first acute transmural myocardial infarction were studied with serial electrocardiography and two-dimensional echocardiography. Reciprocal change was noted in all patients with inferior infarction (mean maximal ST segment depression 3.53 ± 1.97 mm) and 70{\%} of patients with anterior infarction (mean maximal ST depression 1.45 ± 0.8 mm, p = 0.001). When initially present, reciprocal change had resolved within 24 hours in 59{\%} of patients. The sum of reciprocal ST depression correlated with the sum of ST elevation in anterior (r = 0.92, p <0.001) and inferior (r = 0.55, p = 0.035) infarction, and this relation persisted when maximal ST depression and elevation were considered. Echocardiographic evidence of contraction abnormalities in areas of the left ventricle remote from the infarction was seen in 45{\%} of patients. However, its presence did not correlate with the presence of reciprocal change. Although reciprocal change progressively diminished on serial electrocardiograms (maximal ST depression 2.73 ± 1.77 mm at 19 hours after onset of symptoms; 1.0 ± 0.92 mm at 2 to 3 days; and 0.22 ± 0.26 mm at 7 to 10 days; p <0.05), the corresponding serial echocardiograms showed no change in the function of the remote wall (remote wall motion index 1.87 ± 0.65, 1.81 ± 0.62, 1.86 ± 0.47, respectively, p = NS). These data, therefore, do not support the hypothesis that reciprocal ST depressions during early acute transmural myocardial infarction reflect remote ischemia. Rather, these changes are influenced by factors determining the degree of acute ST elevation, previously shown to include infarct size, shape, location, transmurality and duration.",
author = "Camara, {E. J N} and Nisha Chandra and Pamela Ouyang and Sheldon Gottlieb and Edward Shapiro",
year = "1983",
doi = "10.1016/S0735-1097(83)80160-0",
language = "English (US)",
volume = "2",
pages = "251--257",
journal = "Journal of the American College of Cardiology",
issn = "0735-1097",
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TY - JOUR

T1 - Reciprocal ST change in acute myocardial infarction

T2 - Assessment by electrocardiography and echocardiography

AU - Camara, E. J N

AU - Chandra, Nisha

AU - Ouyang, Pamela

AU - Gottlieb, Sheldon

AU - Shapiro, Edward

PY - 1983

Y1 - 1983

N2 - To evaluate the incidence, time course and significance of reciprocal change, 25 consecutive patients admitted with their first acute transmural myocardial infarction were studied with serial electrocardiography and two-dimensional echocardiography. Reciprocal change was noted in all patients with inferior infarction (mean maximal ST segment depression 3.53 ± 1.97 mm) and 70% of patients with anterior infarction (mean maximal ST depression 1.45 ± 0.8 mm, p = 0.001). When initially present, reciprocal change had resolved within 24 hours in 59% of patients. The sum of reciprocal ST depression correlated with the sum of ST elevation in anterior (r = 0.92, p <0.001) and inferior (r = 0.55, p = 0.035) infarction, and this relation persisted when maximal ST depression and elevation were considered. Echocardiographic evidence of contraction abnormalities in areas of the left ventricle remote from the infarction was seen in 45% of patients. However, its presence did not correlate with the presence of reciprocal change. Although reciprocal change progressively diminished on serial electrocardiograms (maximal ST depression 2.73 ± 1.77 mm at 19 hours after onset of symptoms; 1.0 ± 0.92 mm at 2 to 3 days; and 0.22 ± 0.26 mm at 7 to 10 days; p <0.05), the corresponding serial echocardiograms showed no change in the function of the remote wall (remote wall motion index 1.87 ± 0.65, 1.81 ± 0.62, 1.86 ± 0.47, respectively, p = NS). These data, therefore, do not support the hypothesis that reciprocal ST depressions during early acute transmural myocardial infarction reflect remote ischemia. Rather, these changes are influenced by factors determining the degree of acute ST elevation, previously shown to include infarct size, shape, location, transmurality and duration.

AB - To evaluate the incidence, time course and significance of reciprocal change, 25 consecutive patients admitted with their first acute transmural myocardial infarction were studied with serial electrocardiography and two-dimensional echocardiography. Reciprocal change was noted in all patients with inferior infarction (mean maximal ST segment depression 3.53 ± 1.97 mm) and 70% of patients with anterior infarction (mean maximal ST depression 1.45 ± 0.8 mm, p = 0.001). When initially present, reciprocal change had resolved within 24 hours in 59% of patients. The sum of reciprocal ST depression correlated with the sum of ST elevation in anterior (r = 0.92, p <0.001) and inferior (r = 0.55, p = 0.035) infarction, and this relation persisted when maximal ST depression and elevation were considered. Echocardiographic evidence of contraction abnormalities in areas of the left ventricle remote from the infarction was seen in 45% of patients. However, its presence did not correlate with the presence of reciprocal change. Although reciprocal change progressively diminished on serial electrocardiograms (maximal ST depression 2.73 ± 1.77 mm at 19 hours after onset of symptoms; 1.0 ± 0.92 mm at 2 to 3 days; and 0.22 ± 0.26 mm at 7 to 10 days; p <0.05), the corresponding serial echocardiograms showed no change in the function of the remote wall (remote wall motion index 1.87 ± 0.65, 1.81 ± 0.62, 1.86 ± 0.47, respectively, p = NS). These data, therefore, do not support the hypothesis that reciprocal ST depressions during early acute transmural myocardial infarction reflect remote ischemia. Rather, these changes are influenced by factors determining the degree of acute ST elevation, previously shown to include infarct size, shape, location, transmurality and duration.

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