Doctor insights on:
Whats The Difference Between Dopamine And Dobutamine
1 extra carbon atom: Epinephrine has 1 more carbon & 2 more hydrogen atoms then norepinephrine. This small difference makes the molecules look different, so they interact differently with receptors, and have different effects. One example: norEpinephrine narrows blood vessels, increasing blood pressure; Epinephrine can narrow some arteries while dilating others, and can raise or lower blood pressure. ...Read moreSee 1 more doctor answer
Drugs for Heart Test: Chemical stress tests are used to diagnose heart artery blockage in people who cannot treadmill exercise. Persantine is injected IV and dilates normal blood vessels more than abnormal ones causing an ischemic defect on a nuclear image. Dobutamine is injected IV and increases the heart rate and contractility with muscle fed by a blocked artery not responding as well as normal muscle. ...Read moreSee 1 more doctor answer
Both: Are made in the adrenal glands of the body and are released in response to a need for increased energy. The fight or flight phenomenon. The biggest difference is that nor-epi causes more vasoconstriction of blood vessels where epi causes more increase in heart rate and cardiac output through contractility. ...Read moreSee 1 more doctor answer
Stimulants: Methamphetamine (desoxyn) belongs to the amphetamine group of stimulants. It comes in 2 forms; dextro- form which is the psychostimulant, & the levo-form which is an over-the-counter nasal decongestant. Meth is highly addictive. Methylphenidate (ritalin) belong to the non-amphetamine group of stimulants. Due to ritalin's short elimination half-life, rebound symptoms are more common. ...Read more
Receptors: These three medications are used to support the heart and cardiovascular system ie. blood pressure and heart rate. They are known as sympathomimetics and have a similar response to what you would think of as adrenaline. Each has variable effect on either heart rate, heart function (in terms of strength of 'squeeze') and on blood vessels which would translate to higher blood pressure. ...Read more
See below: •noradrenaline is the main neurotransmitter of the sympathetic nerves in the cardiovascular system. •adrenaline is the main hormone secreted by the adrenal medulla. •the sympathetic noradrenergic system plays major roles in tonic and reflexive changes in cardiovascular tone. •adrenaline is a major determinant of responses to metabolic or global challenges to homeostasis. ...Read more
Antidepressants: They are pretty different on the neurotransmitters they affect (serotonin/norepinephrin), half life, molecular structure, side effects (like weight gain, paroxetine causes this more often; etc) and pharmacodynamics. They share some indications and uses (besides obviously as antidepressants) and both are relatively inexpensive. ...Read more
Cardioversion and pa: Cardioversion is usually a single large shock delivered to the heart during an arrhythmia to stop it and let it restart with a normal rhythm. Pacing is small shocks applied to restore normal timing to the cardiac events, especially when the intrinsic rate/rhythm are too slow. ...Read more
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