EP105: Blood Pressure - The Higher or Lower Number?

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. In this episode, he addresses a fundamental question in cardiovascular health: whether the systolic (top) or diastolic (bottom) number is more important when measuring blood pressure. Through detailed explanation and recent research findings, Dr. Bishop explores what these measurements mean and their relative significance in predicting cardiovascular risk. Key Takeaways: Systolic blood pressure measures the highest pressure during heart contraction, while diastolic blood pressure measures pressure during the relaxation phase when the heart is not actively pumping. A major study analyzing 36 million blood pressure readings from 1.3 million people found that systolic pressure above 140 mmHg carries approximately 18% higher risk of complications, while diastolic pressure above 90 mmHg carries only 5-10% higher risk. Both systolic and diastolic measurements are important for assessing cardiovascular health, but systolic pressure is slightly more predictive of increased risk than diastolic pressure. Elevated blood pressure causes wear and tear on blood vessels and the heart, and is closely linked to cardiac failure, atrial fibrillation, and stroke risk. The lower your blood pressure (without causing symptoms like dizziness or lightheadedness), the better for long-term cardiovascular health and vascular protection. The SPRINT trial demonstrates that aggressively lowering blood pressure in high-risk patients provides clear benefits in reducing major adverse coronary events. Patients should regularly monitor their blood pressure with their doctor, pharmacist, or physiotherapist and take action if readings are abnormal.