Search results
Results from the WOW.Com Content Network
Respiratory sinus arrhythmia (RSA) is frequently used as a noninvasive method for investigating vagal tone, in physiological, behavioral, and several clinical studies. [ 16 ] [ 17 ] [ 18 ] This can be done using electrocardiography (ECG) recording, [ 19 ] although other methods are also being developed that take advantage of the interactions ...
Sinus arrhythmia is a commonly encountered variation of normal sinus rhythm. Sinus arrhythmia characteristically presents with an irregular rate in which the variation in the R-R interval is more than 0.12 seconds (120 milliseconds). Additionally, P waves are typically mono-form and in a pattern consistent with atrial activation originating ...
A slow rhythm (less than 60 beats/min) is labelled bradycardia. This may be caused by a slowed signal from the sinus node (sinus bradycardia), by a pause in the normal activity of the sinus node (sinus arrest), or by blocking of the electrical impulse on its way from the atria to the ventricles (AV block or heart block).
[18] [19] The main mechanism by which the parasympathetic nervous system acts on vascular and cardiac control is the so-called respiratory sinus arrhythmia (RSA). RSA is described as the physiological and rhythmical fluctuation of heart rate at the respiration frequency, characterized by heart rate increase during inspiration and decrease ...
In Taylor, Wang & Leite's 2022 review, the evidence for the presence of cardio-respiratory interactions similar to respiratory sinus arrhythmia (RSA) and their potential purpose in blood oxygenation in many vertebrate species (both air- and water-breathing) leads them to conclude that RSA may be a relic of older cardio-respiratory systems ...
This device is implanted under the skin and can continually monitor the heart rhythm. If the device detects a dangerous heart rhythm disturbance it can deliver a small electric shock with the aim of restoring a rhythm. Implanting an ICD in someone with short QT syndrome who has not yet experienced a life-threatening arrhythmia is more ...
There are no formal diagnostic criteria for TIC. Thus, TIC is typically diagnosed when (1) tests have excluded other causes of cardiomyopathy and (2) there is improvement in myocardial function after treatment of the tachycardia or arrhythmia. [1] [5] [6] Treatment of TIC can involve treating the heart failure as well as the tachycardia or ...
Non-respiratory causes of sinus arrhythmia include sinus pause, sinus arrest, and sinoatrial exit block. Sinus pause and arrest involve slowing or arresting of automatic impulse generation from the sinus node. This can lead to asystole or cardiac arrest if ventricular escape rhythms do not create backup sources of cardiac action potentials. [2]