Which cardiac condition is disqualifying?

Hypertrophic cardiomyopathy is disqualifying due to its association with an increased risk for life-threatening arrhythmias and sudden cardiac death, particularly in individuals who engage in vigorous activities such as commercial driving. The condition is characterized by abnormal thickening of the heart muscle, which can lead to various complications, including obstruction of blood flow and irregular heartbeats. In the context of DOT medical examinations, the safety of the driver and the potential risks associated with this condition take precedence, hence leading to disqualification.

Ebstein anomaly, while it is a congenital heart defect and may require careful evaluation, does not automatically disqualify an individual unless it is associated with significant complications or functional limitations that impair driving capability. Similarly, aortic valve repair for aortic stenosis can allow for individuals to be certified if they are stable and meet the medical standards set forth, provided there is sufficient time for recovery and no ongoing significant issues related to the procedure. Thus, the concerns linked specifically to hypertrophic cardiomyopathy justify its disqualifying status in the context of this exam.