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Learn the ECG changes associated with electrolyte imbalance (electrolyte disorders), with emphasis on potassium, magnesium and calcium. Includes a complete e-book, video lectures, clinical management, guidelines and much more.
Electrolytes carry electrical charge and are maintained to tight physiological concentrations through various mechanisms to ensure appropriate heart function (see ‘Standard serum concentrations’).
Cardiac output and blood pressure are a result of the cardiac cycle. Cardiac output is the amount of blood pumped out a ventricle in one minute. Blood pressure is the pressure placed or exerted on the walls of the blood vessels during the cardiac cycle.
Understanding how electrolytes are involved in cardiac conduction and function is key to understanding the heart. View the video lesson and study tools now!
Fluid & Electrolytes Cheat Sheet Potassium 3.0 - 3.5 P - Potassium P - Priority! Since it.. P - Pumps the heart & muscles HYPERkalemia (over 3.5) Heart - TIGHT & CONTRACTED 1ST elevation and Peaked T waves 2 Severe = Vfib or Cardiac Standstill! 3 Hypotension, Bradycardia GI TRACT - TIGHT & CONTRACTED 1 Diarrhea 2 Hyperactive bowel sounds NEUROMUSCULAR - TIGHT & CONTRACTED
Potassium is necessary for normal cardiac function, neural function, and muscle contractility, including effective contractility of the cardiac muscles. Abnormal potassium levels can cause significantly abnormal heart rhythms and contractility.
Identify and describe the components of the conducting system that distributes electrical impulses through the heart. Compare the effect of ion movement on membrane potential of cardiac conductive and contractile cells. Relate characteristics of an electrocardiogram to events in the cardiac cycle.
