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04.05.2018 | Original Paper

Electrocardiography based prediction of hypertrophy pattern and fibrosis amount in hypertrophic cardiomyopathy: comparative study with cardiac magnetic resonance imaging

The International Journal of Cardiovascular Imaging
Chul Hwan Park, Hyemoon Chung, Yoonjung Kim, Jong-Youn Kim, Pil-Ki Min, Kyung-A. Lee, Young Won Yoon, Tae Hoon Kim, Byoung Kwon Lee, Bum-Kee Hong, Se-Joong Rim, Hyuck Moon Kwon, Eui-Young Choi
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Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s10554-018-1365-6) contains supplementary material, which is available to authorized users.


Although, cardiac magnetic resonance imaging (CMR) is a gold standard for risk stratification of hypertrophic cardiomyopathy (HCM), is limited in some situations. We sought to evaluate the predictive power of quantitative electrocardiography in assessing hypertrophy pattern and fibrosis in HCM. Eighty-eight patients with HCM were studied. Voltage of R–S–T waves, number of fragmented QRS (fQRS) complexes, and T wave morphology were measured by 12-lead electrocardiography. Sixteen segmental thickness, late gadolinium enhancement (LGE), native T1, extracellular volume fraction (ECV), and T2, left ventricular (LV) mass and %LGE were measured by CMR. Patterns of LV hypertrophy were classified as pure apical, mixed, or asymmetrical septal hypertrophy. Positive and negative predictive values of biphasic T wave for pure apical type were 70.4 and 63.9%, and the predictive values of precordial negative T wave sums \(>\) 12.5 mm were 69.2 and 79.6%. Precordial S waves, especially Cornell voltage index, were significantly correlated to LV mass index and maximal thickness (p \(<\hspace{0.17em}\)0.001). The number of fQRS leads was significantly correlated to %LGE, average ECV, and T2 (all p \(<\hspace{0.17em}\)0.001). More than one lead with fQRS could predict \(>\hspace{0.17em}\)5% of LGE mass with 58% sensitivity and 63% specificity (p = 0.049, area under the curve = 0.627). However, degree of correlation between maximal thickness and precordial S was poor in cases with fQRS more two leads. T wave morphology and precordial S helps discriminate hypertrophy pattern and maximal hypertrophy, however, in cases with more than two leads of concomitant fQRS, CMR defines fibrosis amount and hypertrophy more accurately.

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Supplementary material 1 (DOCX 14 KB)
Supplementary material 2 (TIF 122 KB)
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