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Coronary steal. Coronary steal (with its symptoms termed coronary steal syndrome or cardiac steal syndrome) is a phenomenon where an alteration of circulation patterns leads to a reduction in the blood flow directed to the coronary circulation. [ 1] It is caused when there is narrowing of the coronary arteries and a coronary vasodilator [ 2] is ...
Bradycardia. Bradycardia, also called bradyarrhythmia, is a resting heart rate under 60 beats per minute (BPM). [ 1] While bradycardia can result from various pathologic processes, it is commonly a physiologic response to cardiovascular conditioning or due to asymptomatic type 1 atrioventricular block. Resting heart rates of less than 50 BPM ...
Sinus node dysfunction ( SND ), also known as sick sinus syndrome ( SSS ), is a group of abnormal heart rhythms ( arrhythmias) usually caused by a malfunction of the sinus node, the heart's primary pacemaker. [1] [2] Tachycardia-bradycardia syndrome is a variant of sick sinus syndrome in which the arrhythmia alternates between fast and slow ...
Illustration of an implantable cardioverter-defibrillator (ICD) An implantable cardioverter-defibrillator (ICD) is a battery-powered device that monitors electrical activity in the heart, and when an arrhythmia is detected, can deliver an electrical shock to terminate the abnormal rhythm. ICDs are used to prevent sudden cardiac death (SCD) in ...
t. e. Benzodiazepine withdrawal syndrome ( BZD withdrawal) is the cluster of signs and symptoms that may emerge when a person who has been taking benzodiazepines as prescribed develops a physical dependence on them and then reduces the dose or stops taking them without a safe taper schedule .
Nifedipine, sold under the brand name Procardia among others, is a calcium channel blocker medication used to manage angina, high blood pressure, Raynaud's phenomenon, and premature labor. [2] It is one of the treatments of choice for Prinzmetal angina. [2] It may be used to treat severe high blood pressure in pregnancy. [2]
Transcutaneous pacing ( TCP ), also called external pacing, is a temporary means of pacing a patient's heart during a medical emergency. It should not be confused with defibrillation (used in more serious cases, in ventricular fibrillation and other shockable rhythms) using a manual or automatic defibrillator, though some newer defibrillators ...
Fetal distress, also known as non-reassuring fetal status, is a condition during pregnancy or labor in which the fetus shows signs of inadequate oxygenation. [ 1] Due to its imprecision, the term "fetal distress" has fallen out of use in American obstetrics. [ 2][ 1][ 3] The term "non-reassuring fetal status" has largely replaced it. [ 4]