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The term "relative bradycardia" can refer to a heart rate lower than expected in a particular disease state, often a febrile illness. [8] Chronotropic incompetence (CI) refers to an inadequate rise in heart rate during periods of increased demand, often due to exercise, and is an important sign of SND and an indication for pacemaker implantation.
The decreased heart rate can cause a decreased cardiac output resulting in symptoms such as lightheadedness, dizziness, hypotension, vertigo, and syncope. [3] The slow heart rate may also lead to atrial, junctional, or ventricular ectopic rhythms. Bradycardia is not necessarily problematic.
What do I do if my resting heart rate is too high or low? ... Conditions including obstructive sleep apnea and chemical imbalances in the blood can cause bradycardia. Older adults are more prone ...
However, oftentimes lower heart rates can be totally normal, and a well-trained athlete can have a normal heart rate in the 50s or as low as 40 without any cause for concern, he notes.
Low blood pressure occurs due to decreased systemic vascular resistance resulting from loss of sympathetic tone, which in turn causes blood pooling within the extremities rather than being available to circulate throughout the body. The slowed heart rate results from a vagal response unopposed by a sympathetic nervous system (SNS) response. [2]
A faster-than-normal heart rate. ... Low-dose aspirin therapy. Beta-blockers. Nitroglycerin. ... Dilated cardiomyopathy is one of the main causes of heart failure.
Athletic heart syndrome (AHS) is a non-pathological condition commonly seen in sports medicine in which the human heart is enlarged, and the resting heart rate is lower than normal. The athlete's heart is associated with physiological cardiac remodeling as a consequence of repetitive cardiac loading. [ 3 ]
A low resting heart rate in the 50s is generally associated with better cardiovascular health, continues Dr. Steinbaum. “This implies that the arteries are healthy and dilate easily and the ...