Heart rate deceleration capacity as a marker of perioperative risk: identifying relevant patient phenotypes and surgical procedures.

Abstract excerpt

Loss of regulation of the autonomic nervous system is found in many diseases from the age of 50 to 60 yr and even more so in older patients. The imbalance is usually manifested by an increase in sympathetic tone, long considered to be the most deleterious element in terms of cardiac rhythmic risk, but also by a reduction in the effectiveness of short-term regulation of the baroreflex arc (partial loss of...

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