Clinical topic: Nuclear imaging in hypertrophic cardiomyopathy

Area of Science:

• Cardiology
• Medical Imaging
• Nuclear Medicine

Background:

• Non-invasive cardiac imaging is crucial for diagnosing and managing hypertrophic cardiomyopathy (HCM).
• Echocardiography and cardiac MRI are primary tools for assessing cardiac structure and function.
• Nuclear imaging offers unique insights into myocardial ischemia and innervation in HCM.

Purpose of the Study:

• To review the role of nuclear imaging in enhancing phenotyping and risk stratification for HCM patients.
• To highlight the application of nuclear techniques in predicting heart failure progression.
• To discuss the utility of nuclear imaging in evaluating arrhythmogenic substrates and sudden cardiac death risk.

Main Methods:

• Review of current literature on nuclear imaging techniques in hypertrophic cardiomyopathy.
• Focus on positron emission tomography (PET) for microvascular dysfunction and sympathetic innervation.
• Integration of nuclear imaging findings with echocardiography and cardiac MRI data.

Main Results:

• Nuclear imaging assesses left ventricular function and myocardial ischemia, including microvascular dysfunction.
• Abnormal sympathetic myocardial innervation can be detected using nuclear techniques.
• PET imaging aids in risk stratification for adverse cardiac events in HCM.

Conclusions:

• Nuclear imaging techniques are valuable for refining the phenotype and risk stratification of HCM patients.
• These methods improve the prediction of heart failure progression and sudden cardiac death.
• Nuclear imaging complements other modalities for comprehensive HCM assessment.