Final answer:
When LBBB is present, diagnosing CAD can be challenging based solely on ECG findings. Additional diagnostic tests such as echocardiography, cardiac stress test, and coronary angiography can help confirm CAD.
Step-by-step explanation:
An LBBB (Left Bundle Branch Block) is a delay or blockage in the electrical conduction system of the heart. When a patient with LBBB presents with symptoms suggestive of coronary artery disease (CAD), it can be challenging to diagnose CAD based solely on the ECG findings.
Diagnostic tests that can help confirm CAD in the presence of LBBB include:
- Echocardiography: This imaging test uses ultrasound waves to view the structure and function of the heart. It can help identify any abnormalities or damage to the heart muscle that may indicate CAD.
- Cardiac stress test: This test involves exercising on a treadmill or using medications to mimic the effects of exercise on the heart. It can help detect any reduced blood flow to the heart during stress, which may be indicative of CAD.
- Coronary angiography: This invasive procedure involves injecting a contrast dye into the coronary arteries to visualize any blockages or narrowing that may be causing CAD.