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2

I am afraid you cannot build the classic ECG using only 1 hand. Probably, you can measure HR - heart rate accordingly to pressure detection and similar sensors and from that you can simulate ECG by picture. Simulate I mean you cannot build any reliably ECG curve on the monitor, but can show some waves after every heart beat.


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Pathological potassium concentration promotes arrhythmia. Increased extracellular potassium inactivates $Na^+$ channels and opens $K^+$ channels, causing the cells to become refractory [1]: Increased extracellular potassium levels result in depolarization of the membrane potentials of cells due to the increase in the equilibrium potential of potassium. ...


4

The normal cardiac cycle is comprised of two distinct phases: the systolic phase in which the heart contracts, ejecting the blood, followed by the the diastolic phase when the cardiac muscle relaxes, refilling the heart with blood. This cycle is assured by specialised cardiomyocytes (Cardiac muscle cells) that conduct electrical impulses through the heart. ...


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The normal cardiac cycle consists of 7 distinct phases: Atrial systole Isovolumetric ventricular contraction Rapid ventricular ejection Reduced ventricular ejection Isovolumetric ventricular relaxation Rapid ventricular filling where atrias and ventricles depolarise sequentally; and ventrcles contract after atrias. It is simplification to say that ...


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There are many reasons why the maximal heart rate decreases with age. The most prevalent is the heterogenous thickening of the walls of the heart. Cardiac output is stroke volume times heart rate. When the wall thickens, the heart needs more energy to achieve the same pumping (bigger stroke volume) or it needs to increase heart rate at rest. Because of ...



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