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March 1, 1963Circulation

Recognition of Anterior Wall Infarction in Patients with Left Ventricular Hypertrophy

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Why the study?

Does Frank lead system vectorcardiography improve the recognition of anterior wall infarction in patients with left ventricular hypertrophy compared to standard electrocardiography?

Population

120 subjects, comprising 36 patients with left ventricular hypertrophy, 24 patients with left ventricular…

Comparison

Vectorcardiograms registered by the Frank lead… vs Standard precordial electrocardiogram and normal…

Design

Cross-sectional

Authors

PHPaul G. HugenholtzAmes Research CenterTRThomas J. RyanDartmouth CollegeTWThomas WoernerBrigham and Women's Hospital

Discussion

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Implication

May aid anterior MI detection in LVH with ambiguous ECGs; supports prior criteria but leaves open need for prospective validation.

Key Points

  • The study aims to distinguish between left ventricular hypertrophy alone and hypertrophy with anterior wall infarction using vectorcardiographic techniques.
  • Analyzed horizontal plane projections of vectorcardiograms in 36 patients with hypertrophy and 24 with anterior wall infarction, compared to 60 controls.
  • Assessments included maximum QRS vectors and 0.01-, 0.02-, and 0.03-second vector measurements at autopsy.
  • Evaluated the influence of right ventricular hypertrophy and posterobasal infarction on diagnosis.
  • The 0.02-second QRS vector effectively separated patients with anterior wall infarction from those with left ventricular hypertrophy, p<0.05.
  • The maximum QRS vector reliably differentiated left ventricular hypertrophy from the infarct group, maintaining high accuracy confirmed at autopsy.
  • Confirmed diagnosis accuracy in all 12 patients with ambiguous electrocardiogram findings, correlating with vectorcardiographic results.

Structured PICO

Does Frank lead system vectorcardiography improve the recognition of anterior wall infarction in patients with left ventricular hypertrophy compared to standard electrocardiography?

P
Population
120 subjects, comprising 36 patients with left ventricular hypertrophy, 24 patients with left ventricular hypertrophy and associated anterior wall infarction (all studied at autopsy), and 60 previously reported control subjects.
I
Intervention
Vectorcardiograms registered by the Frank lead system (analysis of horizontal plane projections, specifically 0.01-, 0.02-, 0.03-second, and maximum QRS vectors).
C
Comparator
Standard precordial electrocardiogram and normal control subjects.
O
Outcome
Accuracy of vectorcardiographic differentiation between left ventricular hypertrophy and left ventricular hypertrophy with anterior infarction, confirmed at autopsy.surrogate

The Frank vectorcardiogram is a sensitive and reliable method for differentiating left ventricular hypertrophy from left ventricular hypertrophy with anterior wall infarction, serving as a useful adjunct when standard ECG findings are ambiguous.

Cite This Study

Hugenholtz et al. (1963) studied this question.

synapsesocial.com/papers/6a153fe779ff98d0de4e52a0https://doi.org/10.1161/01.cir.27.3.386
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Also Consider

Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1A Clinical Appraisal of the Vectorcardiogram in Myocardial Infarction1961 · 82 citations
  2. 2The Correlation Between the Electrocardiographic Patterns of Ventricular Hypertrophy and the Anatomic Findings1960 · 123 citations
  3. 3Pitfalls in the Electrocardiographic Diagnosis of Left Ventricular Hypertrophy1959 · 60 citations
  4. 4QRS-T Patterns in Multiple Precordial Leads that May Be Mistaken for Myocardial Infarction1950 · 49 citations