What condition can disqualify a driver with mitral regurgitation from certification?

A driver with mitral regurgitation may be disqualified from certification due to the presence of fatigue and dyspnea. These symptoms indicate that the condition is affecting the driver's cardiovascular efficiency and overall ability to operate a commercial vehicle safely. Fatigue can severely impair concentration and reaction times, while dyspnea, or shortness of breath, may indicate compromised cardiac output.

In the context of FMCSA guidelines, medical conditions that affect a driver's ability to perform their duties safely are key considerations for certification. If a driver is experiencing these symptoms, it suggests a significant risk which the FMCSA aims to mitigate by ensuring only those who are medically fit are allowed to drive commercially.

While surgery and the absence of symptoms are important considerations as well, a history of surgery alone does not automatically disqualify a driver if they are symptom-free. Similarly, being asymptomatic can indicate that the condition is currently stable, allowing for potential certification, provided all other health criteria are met. Therefore, the presence of fatigue and dyspnea is a critical factor in determining disqualification.