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Beta blocker. Skeletal formula of propranolol, the first clinically successful beta blocker. Beta blockers, also spelled β-blockers, are a class of medications that are predominantly used to manage abnormal heart rhythms (arrhythmia), and to protect the heart from a second heart attack after a first heart attack (secondary prevention). [1]
Frequency. 0.2% [1] Wolff–Parkinson–White syndrome (WPWS) is a disorder due to a specific type of problem with the electrical system of the heart involving an accessory pathway able to conduct electrical current between the atria and the ventricles, thus bypassing the atrioventricular node. [2][3] About 60% of people with the electrical ...
diazepam, benzodiazepines, beta blockers, anti-hypertensives. An adrenergic storm is a sudden and dramatic increase in serum levels of the catecholamines adrenaline and noradrenaline (also known as epinephrine and norepinephrine respectively), with a less significant increase in dopamine transmission. It is a life-threatening condition because ...
Cardiology. A premature ventricular contraction (PVC) is a common event where the heartbeat is initiated by Purkinje fibers in the ventricles rather than by the sinoatrial node. PVCs may cause no symptoms or may be perceived as a "skipped beat" or felt as palpitations in the chest. PVCs do not usually pose any danger.
Beta blockers are a heart medication, but some docs prescribe it off-label to help with situational anxiety. Click here for more on just how that works.
Beta blockers are used in both cases, but treatment with diuretics, a mainstay of CHF treatment, will exacerbate symptoms in hypertrophic obstructive cardiomyopathy by decreasing ventricular preload volume and thereby increasing outflow resistance (less blood to push aside the thickened obstructing tissue).
Beta-blockers, which slow down the heart and reduce the force of its contractions. Ace Inhibitors, which block the formation of Angiotensin II, a chemical that causes blood vessels to constrict ...
Also, neuromuscular blockers may facilitate histamine release, which causes hypotension, flushing, and tachycardia. Succinylcholine may also trigger malignant hyperthermia in rare cases in patients who may be susceptible. In depolarizing the musculature, suxamethonium may trigger a transient release of large amounts of potassium from muscle fibers.