Tag: tachycardia
The Long Plateau Phase Due to the Influx of Calcium Ions – Action Potential in Cardiac Cells
The action potential in cardiac cells is a fascinating process that underpins the heart’s rhythmic contractions, with a distinctive long plateau phase driven by calcium ion influx. This diagram highlights the long plateau phase and extended refractory period, illustrating how these features ensure the heart completes its contraction cycle effectively. Exploring this image provides a deeper understanding of the electrophysiological mechanisms that sustain cardiac function.
Action Potential at the SA Node Diagram: A Comprehensive Overview
The sinoatrial (SA) node, as the heart’s natural pacemaker, generates electrical impulses that initiate each heartbeat, a process vividly illustrated in this diagram. This image details the prepotential, threshold, rapid depolarization, and repolarization phases, highlighting the unique absence of a resting potential and the role of sodium ion influx in driving spontaneous activity. Exploring this diagram provides a clear understanding of how the SA node sustains the heart’s rhythmic contractions.
A Critical Analysis of Acute Upper GI Bleeding in a 7-Month-Old Infant
Upper gastrointestinal bleeding in infants represents a significant medical emergency requiring prompt recognition and intervention. This case study examines a 7-month-old female patient presenting with hematemesis and melena, highlighting the critical aspects of diagnosis, immediate management, and clinical decision-making.
