What does this research mean for the field?

Left ventricular hypertrophy with marked left axis deviation can be classified into three distinct vectorcardiographic patterns, distinguishing between electrical forces caused directly by hypertrophy, hypertrophy combined with left anterior fascicular block, and delayed postero-basal excitation. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

January 1, 1975Okayama Igakkai Zasshi (Journal of Okayama Medical Association)Open Access

Left Ventricular Hypertrophy and Left Axis Deviation in Ecg. (Study on Vectorcardiograms Recorded with Frank's system)

View Full Paper

Ask AI

Bookmark

Why the study?

Does left ventricular hypertrophy with marked left axis deviation correlate with specific vectorcardiographic patterns indicative of left anterior fascicular block?

Population

67 patients with diseases producing systolic overload on the left ventricle showing left ventricular…

Comparison

Vectorcardiogram (Frank's system) analysis vs Comparison among three groups based on…

Design

Cross-sectional

Authors

KMKuniko MaeshimaOkayama University DSDaiji SaitoCity Hospital TFTakashi FujitaGifu Prefectural Tajimi Hospital

Discussion

Member takes

Implication

Supports LAFB contribution to marked LAD in LVH on VCG; hypothesis-generating and should not yet change practice.

Structured PICO

Does left ventricular hypertrophy with marked left axis deviation correlate with specific vectorcardiographic patterns indicative of left anterior fascicular block?

Population

67 patients (53 male, 14 female, mean age 58.2 years) with diseases producing systolic overload on the left ventricle (63 essential hypertension, 2 renal hypertension, 2 aortic stenosis) showing left ventricular hypertrophy on standard 12-lead ECG. Excluded: prior MI, aortic regurgitation, mitral regurgitation, complete RBBB/LBBB, QRS > 0.12s.

Intervention

Vectorcardiogram (Frank's system) analysis

Comparator

Comparison among three groups based on electrical QRS axis: NAD (+90° to 0°), LAD' (0° to -30°), and LAD (-30° to -90°)

Outcome

Morphological features of the QRS loop in horizontal and frontal planessurrogate

Marked left axis deviation in patients with left ventricular hypertrophy is often associated with specific vectorcardiographic patterns (type D) indicative of left anterior fascicular block.

Cite This Study

Maeshima et al. (1975) studied this question.

synapsesocial.com/papers/6a15bd55a2352da34782d9a2 https://doi.org/10.4044/joma1947.87.5-6_359

View Full Paper

Ask AI

Bookmark

Left Ventricular Hypertrophy and Left Axis Deviation in Ecg. (Study on Vectorcardiograms Recorded with Frank's system)

Discussion

Member takes

Implication

Structured PICO

Cite This Study

Left Ventricular Hypertrophy and Left Axis Deviation in Ecg. (Study on Vectorcardiograms Recorded with Frank's system)

Discussion

Member takes

Implication

Structured PICO

Cite This Study

Also Consider

Also Consider