Anteroapical stunning and left ventricular outflow tract obstruction

Area of Science:

• Cardiology
• Cardiovascular Physiology

Background:

• Dynamic left ventricular outflow tract (LVOT) obstruction is typically associated with hypertrophic cardiomyopathy.
• It can also occur secondary to other conditions like myocardial infarction and sympathetic stimulation.

Observation:

• Three patients presented with chest discomfort, ECG abnormalities, and hemodynamic instability due to LVOT obstruction after emotional stress.
• Coronary disease was not significant, and regional wall motion abnormalities were noted.

Findings:

• Beta-blocker therapy suppressed contractility, resolving the LVOT obstruction gradient and improving clinical status.
• Patients showed excellent functional recovery and normalized ventricular function upon follow-up.

Implications:

• This suggests vasospasm, LV stunning, and remodeling can precipitate LVOT obstruction, exacerbated by hypercontractility.
• Management requires avoiding standard cardiogenic shock treatments, favoring conservative approaches for a good prognosis.