Pulzusérzékelés

Pulzusérzékelés, also known as pulse detection or pulse sensing, refers to the process of identifying and measuring the rhythmic expansion and contraction of arteries caused by the heartbeat. This phenomenon is a fundamental physiological indicator of cardiovascular health. The pulse wave is generated as the left ventricle of the heart contracts, pushing blood into the aorta. This pressure wave travels through the arterial system, causing a palpable throbbing sensation at certain points in the body, such as the wrist (radial artery) or neck (carotid artery).

Historically, manual palpation of the pulse has been a common method for assessing heart rate and rhythm. Healthcare professionals use this technique to estimate the number of heartbeats per minute and to detect irregularities in the pulse, which can signify underlying medical conditions. Modern technology has introduced more sophisticated methods for pulzusérzékelés. Photoplethysmography (PPG) is a widely used optical technique that measures changes in blood volume in the microvascular bed of tissue. PPG sensors, often found in wearable devices like smartwatches and fitness trackers, emit light and detect how much of it is absorbed or reflected by the blood, thereby inferring pulse information. Electrocardiography (ECG or EKG) is another crucial method that records the electrical activity of the heart, which directly correlates with the mechanical pumping action and thus the pulse. These technological advancements have made continuous and non-invasive pulse monitoring more accessible for both clinical and personal use.