Abstract
Objective
Chest pain is a common symptom in patients with hypertrophic cardiomyopathy (HCM), causing difficulty determining whether there is coexistent coronary artery disease (CAD). We investigated whether coronary computed tomography angiography (CCTA) can assess the prevalence and clinical significance of CAD in adult patients with HCM showing chest pain through longitudinal follow-up.
Methods
In 238 adult patients with HCM, who underwent CCTA for chest pain, we analyzed the degree of stenosis and adverse plaque characteristics (APCs) as CCTA variables. Three prediction models for adverse cardiovascular events (ACEs: all-cause mortality, myocardial infarction, unstable angina, heart failure, implantable cardioverter-defibrillator implantation, and stroke) were assessed using the combination of clinical risk factors, echocardiographic parameters, and CCTA variables.
Results
The prevalence of obstructive CAD (≥ 50% in luminal stenosis) and APC was 14.7% and 18.9%, respectively. During the follow-up period (median, 37 months; range, 2–108 months), there were 31 occurrences of ACEs (13.0%). Using multivariate Cox regression analysis, age, atrial fibrillation, low ejection fraction, obstructive CAD, and APCs were associated with ACEs (all p < 0.05). Among the prediction models for ACEs, the area under the curve (AUC) was higher (AUC = 0.92) when CCTA variables were added to the clinical (AUC = 0.84) and echocardiographic factors (AUC = 0.88) (p < 0.001).
Conclusions
Using CCTA, about 20% of symptomatic HCM patients were associated with clinically significant atherosclerosis. Adding these CCTA variables to the clinical and echocardiographic variables may increase the predictions of ACEs; therefore, evaluating coronary atherosclerosis using CCTA may be helpful for symptomatic HCM patients.
Key Points
• Chest pain in adult patients with hypertrophic cardiomyopathy (HCM) remains challenging to distinguish from coronary artery disease.
• Coronary computed tomography angiography (CCTA) can assess the severity and characteristics of coronary atherosclerosis in symptomatic HCM patients.
• Adding CCTA variables to clinical and echocardiographic factors may increase the predictions of adverse cardiac events in HCM patients, and thus evaluating coronary atherosclerosis using CCTA may be helpful for HCM patients with chest pain.
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Abbreviations
- ACEs:
-
Adverse cardiovascular events
- AF:
-
Atrial fibrillation
- APCs:
-
Adverse plaque characteristics
- AUC:
-
Area under the curves
- CAD:
-
Coronary artery disease
- CCTA:
-
Coronary computed tomography angiography
- CI:
-
Confidence interval
- ECG:
-
Electrocardiography
- EF:
-
Ejection fraction
- HCM:
-
Hypertrophic cardiomyopathy
- HR:
-
Hazard ratio
- HU:
-
Hounsfield units
- ICD:
-
Implantable cardioverter-defibrillator
- LV:
-
Left ventricle
- MI:
-
Myocardial infarction
- ROC:
-
Receiver-operator characteristic
- UA:
-
Unstable angina
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Funding
This work was supported by the National Research Foundation grant NRF-2015R1D1A1A01059717 funded by the Korea government (MEST).
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The scientific guarantor of this publication is Kyung Won Lee.
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Yongho Jeon, PhD (Department of Applied statistics, College of Commerce and Economics, Yonsei University), one of the authors, has contributed to the statistical analysis.
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Shin, Y.J., Lee, J.H., Yoo, J.Y. et al. Clinical significance of evaluating coronary atherosclerosis in adult patients with hypertrophic cardiomyopathy who have chest pain. Eur Radiol 29, 4593–4602 (2019). https://doi.org/10.1007/s00330-018-5951-8
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DOI: https://doi.org/10.1007/s00330-018-5951-8