Understanding Heart Rate Variability: A Key to Heart Health

Adrian Rawlinson MD
5 min readSep 28, 2023

Heart rate variability (HRV) is a critical yet often overlooked indicator of overall health and well-being. It provides valuable insights into the adaptability and resilience of the cardiovascular system. While HRV may initially seem like a complex concept, grasping its significance is essential for assessing and improving your heart health. In this comprehensive article, we will explore the definition of HRV, the various methods to measure it, what it signifies for your health, and strategies to enhance it.

Heart rate variability, or HRV, refers to the natural fluctuations in the time intervals between successive heartbeats. Essentially, it measures the variability in your heart’s rhythm. This variation is under the control of the autonomic nervous system (ANS), which comprises two branches: the sympathetic (fight or flight) and the parasympathetic (rest and digest) systems. HRV quantifies the balance between these two branches, providing valuable insights into the body’s ability to adapt to various stressors.

Measuring HRV involves various tools and techniques:

a. Electrocardiogram (ECG or EKG): The gold standard for HRV measurement is an ECG. It entails placing electrodes on the skin to record the heart’s electrical activity over a specific time frame. Specialized software then analyzes…

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Adrian Rawlinson MD

Entrepreneurial physician executive, strategic leader, and digital healthcare product innovator.