EP85: More Specific Tests For Heart Failure

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Podcast Summary Introduction Dr. Warrick Bishop is a practicing cardiologist and author dedicated to improving patient care through heart health education, operating the Healthy Heart Network. In this episode, he provides a detailed examination of the specific diagnostic tests used to evaluate cardiac failure, building on previously discussed foundational approaches. The episode focuses on helping patients understand the various imaging and laboratory tools cardiologists employ to accurately diagnose and assess heart problems. Key Takeaways: Echocardiography (ultrasound of the heart) is the single most important go-to test for evaluating cardiac failure, providing real-time dynamic images of how the heart beats and contracts. The ejection fraction—the percentage of blood the left ventricle expels with each beat—is a critical measurement obtained from echocardiograms that helps determine cardiac function status. Echocardiograms can identify whether heart problems are global (affecting the entire heart equally) or regional (affecting specific areas), with regional abnormalities often indicating blocked blood vessels or previous heart attacks. Brain Natriuretic Peptide (BNP) testing detects heart strain by measuring a substance released by heart cells under stress, serving as a valuable discriminator between cardiac and non-cardiac causes of symptoms. BNP levels are useful for long-term monitoring of valve abnormalities, with changes in BNP helping confirm whether the heart is genuinely deteriorating when compared alongside echocardiogram findings. Coronary artery disease evaluation through stress testing, CT imaging, or invasive coronary angiography is essential when diminished heart function is detected, as many cases are treatable. Cardiac Magnetic Resonance Imaging (CMR) provides excellent visualization of scar tissue and inflammation within the heart muscle, crucial information for determining future management strategies. Heart biopsy is a rare but occasionally necessary procedure that involves extracting tissue samples to examine at the cellular level when other tests fail to provide definitive answers.