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Tachycardia, also called tachyarrhythmia, is a heart rate that exceeds the normal resting rate. [1] In general, a resting heart rate over 100 beats per minute is accepted as tachycardia in adults. [1] Heart rates above the resting rate may be normal (such as with exercise) or abnormal (such as with electrical problems within the heart).
Heart rate is a measure of ventricular rather than atrial activity. Impulses from the atria are conducted to the ventricles through the atrio-ventricular node (AV node). In a person with atrial flutter, a 12-lead electrocardiogram (ECG) will demonstrate the atrial chambers of the heart contracting at a rate of 280–300 beats per minute whereas ...
The resting heart rate in children is much faster. In athletes, however, the resting heart rate can be as slow as 40 beats per minute, and be considered normal. [citation needed] The term sinus arrhythmia [26] refers to a normal phenomenon of alternating mild acceleration and slowing of the heart rate that occurs with breathing in and out ...
Get ready for all of today's NYT 'Connections’ hints and answers for #287 on Sunday, March 24, 2024. Today's NYT Connections puzzle for Sunday, March 24 , 2024 The New York Times
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.
Bradycardia, also called bradyarrhythmia, is a resting heart rate under 60 beats per minute (BPM). [1] While bradycardia can result from various pathological processes, it is commonly a physiological response to cardiovascular conditioning or due to asymptomatic type 1 atrioventricular block.
While the reflex may raise heart rate by as much as 40% to 60%, [7] initial attempts to replicate Bainbridge's observations were frequently unsuccessful [8] and this inconsistency was only explained in 1955 when Coleridge and Linden found that the type of heart rate response (increase or decrease) depended on the resting heart rate and the rate ...
Get ready for all of today's NYT 'Connections’ hints and answers for #538 on Saturday, November 30, 2024. Today's NYT Connections puzzle for Saturday, November 30, 2024 The New York Times