The spatial vectorcardiogram in myocardial infarction typified by prominent R waves in Leads aVR and V1

Elek, Stephen R.; Allenstein, Bertram J.; Kornbluth, Alfred W.; Griffith, George C.; Levinson, David C.

doi:10.1016/0002-8703(54)90230-6

Cited by 23 publications

(6 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Textbooks of electrocardiography, with few exceptions,7' contain little or no reference to this category. '-6 Although some authors have commented upon individual changes that might occur in right precordial leads,8' [10][11][12][13][14][15] others have stated that diagnostic signs do not appear in the electrocardiogram as a rule. ' cepted.9 11,13,[15][16][17][18][19][20] This study was undertaken in order to determine whether the diagnosis of strictly posterior infarction could be established by conventional scalar electrocardiography.…”

mentioning

confidence: 99%

The Recognition of Strictly Posterior Myocardial Infarction by Conventional Scalar Electrocardiography

Perloff

1964

Circulation

177

View full text Add to dashboard Cite

This study was undertaken in order to determine whether the standard scalar electrocardiogram contains sufficient information to permit the recognition of strictly posterior myocardial infarction. Sixteen patients were selected on the basis of vectorcardiographic evidence and four on the basis of autopsy evidence. One hundred normal adult electrocardiograms served as controls. The data indicate that strictly posterior infarction causes (1) R waves of 0.04 second in V 1 and in contiguous right anterior chest leads with upright T waves and, in the acute phase, ST-segment depressions, (2) Q waves of 0.04 second in an area posteriorly between the spine and the left scapula, (3) R/S ratios equal to or greater than one in V 1 and V 2 , (4) slurring of the descending limb of the R wave in lead V 1 due to abrupt change in QRS direction, and (5) no pathologic Q waves in the standard 12 leads unless diaphragmatic or lateral infarction coexists. Extra chest leads derived from the right anterior and left posterior thorax serve principally to corroborate the diagnoses. R waves of 0.04 second or R/S ratios equal to or greater than one in lead V 1 were also found in the normal child, complete right bundle-branch block, the Wolff-Parkinson-White syndrome with an anteriorly directed delta wave, right ventricular hypertrophy, and an occasional normal adult especially with vertical frontal plane electrical axis. Attention to these differential diagnoses and to the foregoing manifestations of strictly posterior infarction facilitate its recognition by conventional scalar electrocardiography.

show abstract

mentioning

confidence: 99%

The Recognition of Strictly Posterior Myocardial Infarction by Conventional Scalar Electrocardiography

Perloff

1964

Circulation

177

View full text Add to dashboard Cite

show abstract

“…In conclusion, it appears that the presence of an initial R wave in aVR exceeding 1 (0.1 mv) has diagnostic value specific for the recognition of posterior, and posterior plus anterior, myocardial infarction.…”

Section: Additional Indexing Wordsmentioning

confidence: 83%

Significance of the Initial R Wave in Lead aV _R of the Electrocardiogram in the Diagnosis of Myocardial Infarction

et al. 1967

View full text Add to dashboard Cite

Distribution, means, and standard deviations of the initial R wave in lead aVR of the electrocardiogram are investigated in 1,563 healthy U.S.A., Canadian, and Japanese men, ages 18 to 60 years, and on 448 healthy U.S.A., Canadian, and Japanese women, ages 17 to 51 years, and in samples of cardiac pathology.Findings in the normal group included an initial R wave in about 50% of the group, no significant effect of age, sex, or race on the mean initial R-wave amplitude in lead aVR or its distribution, or on the upper 98% normal limit of the initial R wave, a decrease of the mean R amplitude in aVR with clockwise rotation of the transitional zone, and a highly significant correlation of R amplitude in aVR to that of R in V1, Q3, and Q in aVF, but too low for reliable prediction.Right ventricular hypertrophy, anterior wall myocardial infarction, and hypertensive

show abstract

“…17 When infarction occurred in more than one topographic area, the vectoreardiographic findings are described separately under the appropriate categories. Thus the total number of infarcts Fifty-four of the 62 cases demonstrated counterclockwise rotation in the horizontal plane, 18 after a very short initial clockwise and posterior segment usually of 0.01-second duration.…”

Section: Posterobasal Infarctmentioning

confidence: 99%

A Clinical Appraisal of the Vectorcardiogram in Myocardial Infarction

1961

View full text Add to dashboard Cite

A total of 161 vectorcardiograms was recorded with the Grishman cube system in patients with suspected myocardial infarction. In the group of 49 cases subsequently examined post mortem and of 73 non-autopsied cases, in whom the diagnosis of infarction appeared certain, a comparison was made between the standard electrocardiogram and the vectorcardiogram taken in succession. The vectorcardiogram demonstrated more infarcts than the electrocardiogram. Of a total of 122 cases in which the vectorcardiogram showed infarction, 19 had normal and 17 equivocal electrocardiograms. A number of simple and easily applicable criteria for the vectorcardiographic diagnosis of infarction are given. It appears that even the older, uncorrected cubelead system permits a more accurate diagnosis than currently available standard electrocardiographic procedure. It is suggested that this method of exploration may be useful in cases of suspected myocardial infarction in which the routine electrocardiographic examination leaves doubt.

show abstract

The spatial vectorcardiogram in myocardial infarction typified by prominent R waves in Leads aVR and V1

Cited by 23 publications

References 10 publications

The Recognition of Strictly Posterior Myocardial Infarction by Conventional Scalar Electrocardiography

The Recognition of Strictly Posterior Myocardial Infarction by Conventional Scalar Electrocardiography

Significance of the Initial R Wave in Lead aV _R of the Electrocardiogram in the Diagnosis of Myocardial Infarction

A Clinical Appraisal of the Vectorcardiogram in Myocardial Infarction

Contact Info

Product

Resources

About

The spatial vectorcardiogram in myocardial infarction typified by prominent R waves in Leads aVR and V1

Cited by 23 publications

References 10 publications

The Recognition of Strictly Posterior Myocardial Infarction by Conventional Scalar Electrocardiography

The Recognition of Strictly Posterior Myocardial Infarction by Conventional Scalar Electrocardiography

Significance of the Initial R Wave in Lead aV R of the Electrocardiogram in the Diagnosis of Myocardial Infarction

A Clinical Appraisal of the Vectorcardiogram in Myocardial Infarction

Contact Info

Product

Resources

About

Significance of the Initial R Wave in Lead aV _R of the Electrocardiogram in the Diagnosis of Myocardial Infarction