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Arrhythmias, also known as cardiac arrhythmias, are irregularities in the heartbeat, including when it is too fast or too slow. [2] A resting heart rate that is too fast – above 100 beats per minute in adults – is called tachycardia, and a resting heart rate that is too slow – below 60 beats per minute – is called bradycardia. [2]
Ventricular tachycardia (V-tach or VT) is a cardiovascular disorder in which fast heart rate occurs in the ventricles of the heart. [3] Although a few seconds of VT may not result in permanent problems, longer periods are dangerous; and multiple episodes over a short period of time are referred to as an electrical storm.
An arrhythmia is an irregular heartbeat that occurs due to a problem with the electrical activity of your heart. Types of arrhythmia include: ... very fast heart rate. Premature ventricular ...
Heart arrhythmias refer to problems involving the heart rate or heart rhythm that result from abnormal electrical activity in the heart. Arrhythmias can cause your heart to beat too rapidly ...
[32] [33] Both ventricular tachycardia and ventricular fibrillation can prevent the heart from generating coordinated ventricular contractions, thereby failing to sustain adequate blood circulation. Less common types of arrhythmias occurring in cardiac arrest include pulseless electrical activity, bradycardia, and asystole. [30]
These include angina (chest pain), arrhythmia (abnormal heartbeat), dementia, heart attack, heart failure, kidney failure, stroke, loss of vision and more, many of which can be deadly or ...
An idioventricular rhythm is a cardiac rhythm characterized by a rate of <50 beats per minute (bpm), absence of conducted P waves and widening of the QRS complex. [1] In cases where the heart rate is between 50 and 110 bpm, it is known as accelerated idioventricular rhythm and ventricular tachycardia if the rate exceeds 120 bpm.
Not all premature chamber actions can trigger these dangerous arrhythmias; the risk is increased with ischemia of the heart muscle or with prolonged repolarization time (long QT syndrome). [22] The arrhythmia can also be triggered when an external stimulus such as cardioversion falls in the vulnerable phase of the cardiac cycle.
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