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Premature atrial contractions (PACs) are common in the general population, and increase with age. [5] Over 99% of individuals in the general population will have at least one PAC in a 24-hour period. [6] Many PACs can indicate increased risk of atrial fibrillation and/or ischemic stroke. [6]
Transesophageal atrial stimulation can differentiate between atrial flutter, AV nodal reentrant tachycardia and orthodromic atrioventricular reentrant tachycardia. [25] It can also evaluate the risk in people with Wolff–Parkinson–White syndrome , as well as terminate supraventricular tachycardia caused by re-entry .
Multifocal atrial tachycardia is characterized by an electrocardiogram (ECG) strip with three or more discrete P wave morphologies in the same lead, not including that originating from the sinoatrial node, plus tachycardia, which is a heart rate exceeding 100 beats per minute (although some suggest using a threshold of 90 beats per minute ...
Atrial tachycardia is a type of heart rhythm problem in which the heart's electrical impulse comes from an ectopic pacemaker (that is, an abnormally located cardiac pacemaker) in the upper chambers of the heart, rather than from the sinoatrial node, the normal origin of the heart's electrical activity.
When the atrial rhythm is irregular (as in atrial fibrillation or sinus arrhythmia) the presence of bigeminy depends on the length of the P–P interval and happens more frequently with a longer interval. As with post PVC pauses, a longer P–P interval leads to a higher chance of re-entrant circuits and thus PVCs.
Junctional rhythm is seen equally in men and women, and can be seen intermittently in young children and athletes, especially during sleep. It occurs commonly in patients with sinus node dysfunction. 1/600 cardiology patients over the age of 65 have sinus node dysfunction. [1]
A premature heart beat or extrasystole [1] is a heart rhythm disorder corresponding to a premature contraction of one of the chambers of the heart. Premature heart beats come in two different types: premature atrial contractions and premature ventricular contractions. Often they cause no symptoms but may present with fluttering in the chest or ...
People with presumed ACS are typically treated with aspirin, clopidogrel or ticagrelor, nitroglycerin, and, if the chest discomfort persists, morphine. [22] Other analgesics such as nitrous oxide are of unknown benefit. [22] Angiography is recommended in those who have either new ST elevation or a new left or right bundle branch block on their ...
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