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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 ...
Respiratory arrhythmia (or respiratory sinus arrhythmia). [39] [40] This heart rate variation is directly caused by the central respiratory rhythm, faithfully tracks the respiratory rate across a range of frequencies and is a major cause of heart rate variability in humans (Cooper HE, Clutton-Brock TH & Parkes MJ (2004). Contribution of the ...
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 ...
Children with predispositions to forming clots such as those with sickle cell disease, cancer, coagulation disorders, and central venous catheters are more likely to have pulmonary emboli. Common signs include worsening heart and lung function as evidenced by chest pain, tachycardia , shortness of breath , heart failure , and more.
Those who have severe symptoms from an arrhythmia or are medically unstable may receive urgent treatment with a controlled electric shock in the form of cardioversion or defibrillation. [6] Arrhythmia affects millions of people. [4] In Europe and North America, as of 2014, atrial fibrillation affects about 2% to 3% of the population. [9]
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]
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 ...
A sinus rhythm is any cardiac rhythm in which depolarisation of the cardiac muscle begins at the sinus node. [1] It is necessary, but not sufficient, for normal electrical activity within the heart. [2] On the electrocardiogram (ECG), a sinus rhythm is characterised by the presence of P waves that are normal in morphology. [2]