Simultaneous pressure recording in mid-ventricular obstructive hypertrophic cardiomyopathy

Area of Science:

• Cardiology
• Cardiovascular Physiology

Background:

• Hypertrophic cardiomyopathy (HCM) is a complex cardiac condition.
• Mid-ventricular obstructive hypertrophic cardiomyopathy (MVOHCM) presents unique challenges in diagnosis and management.
• Apical aneurysms and abnormal blood flow patterns are less common but significant complications.

Observation:

• A 70-year-old male patient diagnosed with MVOHCM.
• Cardiac catheterization revealed a significant systolic pressure gradient (90 mmHg) between the apex and base.
• Elevated apical pressure (350 mmHg) was noted post-premature ventricular contraction.
• The left ventricular apical aneurysm appeared dilated and spherical in late systole.

Findings:

• The study suggests the absence of active relaxation in the dilated apical aneurysm contributes to paradoxic jet flow.
• A high systolic pressure gradient indicates severe obstruction and altered hemodynamics.
• Premature ventricular contractions can exacerbate pressure dynamics in affected ventricles.

Implications:

• Understanding the pathogenesis of apical aneurysms and paradoxic flow in MVOHCM is crucial for risk stratification.
• This case highlights the importance of detailed pressure measurements and dynamic imaging in HCM.
• Further research into the mechanisms of impaired relaxation may reveal novel therapeutic targets for MVOHCM complications.