Match each patient presentation evaluating for suspected coronary artery disease with the most appropriate next step in diagnostic test sequencing.
- A 65-year-old man requires preoperative cardiac risk stratification prior to a femoral-popliteal bypass. His baseline electrocardiogram demonstrates a left bundle branch block. He is unable to walk on a treadmill due to severe claudication.Pharmacologic vasodilator myocardial perfusion imaging
- A 58-year-old woman with severe, actively wheezing asthma on multiple inhalers presents with progressive exertional chest tightness. She has advanced bilateral knee osteoarthritis, relies on a wheelchair, and cannot exercise.Pharmacologic dobutamine stress echocardiography
- A 72-year-old man is scheduled for an elective open abdominal aortic aneurysm repair. He has a history of hypertension but no cardiac symptoms. He routinely plays 18 holes of golf twice a week, walking the entire course.Proceed directly to the scheduled intervention without further cardiac testing
- A 55-year-old man with a history of coronary artery bypass grafting five years ago presents with new-onset exertional dyspnea. His resting electrocardiogram is normal and he routinely jogs three miles daily.Exercise stress testing with concurrent cardiac imaging (echocardiography or nuclear perfusion)
- A 50-year-old man presents with episodic chest tightness occurring after heavy exertion. His resting electrocardiogram is completely normal, he takes no medications, and he works in construction, regularly lifting heavy materials.Standard exercise treadmill electrocardiography without concurrent imaging
Answer
The correct pairings appropriately map each patient's clinical scenario to their indicated stress testing modality based on functional capacity, baseline ECG abnormalities, and comorbidities.
The correct diagnostic sequencing in suspected coronary artery disease depends on three primary factors: the patient's ability to exercise, their baseline electrocardiogram, and any specific comorbid contraindications. Standard exercise testing is preferred when possible. If the baseline ECG is uninterpretable (e.g., LBBB, paced rhythm) or if prior revascularization exists, imaging must be added. When exercise is impossible, pharmacologic stress is indicated. Vasodilators (adenosine) are necessary for LBBB but contraindicated in severe asthma, making dobutamine the correct choice for asthmatics. Finally, unnecessary testing should be avoided in asymptomatic preoperative patients with good functional capacity.
Step-by-Step Solution
Key Concept
Selection of Cardiac Stress Testing Modalities