Doctor insights on:
What Is The Difference Between Persantine And Dobutamine
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
What's the difference between a lexiscan stress test & a stress echo dobutamine test? I have had the lexiscan before.
Nuclear/ Echo stress: Lexiscan stress generally performed with nuclear isotope, which shows blood circulation (perfusion), comparing with medication lexiscan (stressing heart) and at rest. Dobutamine echo we are looking at wallmotion of heart with medication dobutamine (stressing heart)and at rest to see they show any differences to detect blockages ...Read moreSee 2 more doctor answers
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
I was wondering what are the differences of levophed, (norepinephrine) dopamine and dobutamine in terms of their action?
You Asked for It----:
Dobutamine- direct b1 receptor stimulant or agonist in the sympathetic nervous system.
Levophed- vasoconstrictor peripherally (alpha adrenergic effects) and beta adrenergic stimulant at the level of the heart and coronary vessels
dopamine- dual b1 and Alpha adrenergic effects. Useful in hypovolemic shock because of conservancy of renal blood flow. Also, works centrally in other complex ways. ...Read more
Alters physiology: These are very simple answers to a complex question. Levophed (norepinephrine) increases blood pressure; Dopamine increases heart rate, blood pressure and cardiac function (contractility); Dobutamine increases cardiac contractility and heart rate. ...Read moreSee 1 more doctor answer
Dobutamine: Dobutamine is a medicine used by physicians to increase blood pressure usually in a heart that does not pump well. It may be used when a patient is in heart failure or has had a heart attack and works by helping the heart to beat stronger and faster. It is given intravenously by an infusion and has a range of doses. Sometimes it is used as a stress test in patients who cannot exercise. ...Read moreSee 1 more doctor answer
Drug induced stress: If exercise on a treadmill is not an option (too much stress on the heart) due to a person’s medical condition, may use an intravenous medication called dobutamine. Dobutamine causes heart to beat faster and will mimic the effects of exercise on the heart. Stress tests usually can be nuclear with radiotracer or with echocardiography. ...Read moreSee 2 more doctor answers
Possible: People suffering from panic disorder can develop panic attacks following triggers, people differ in their specific triggers. Could be increased heart rate, could be nausea or any other physical symptom of anxiety. So, if palpitation and rapid heart beat is usually a trigger for your panic, then see your psychiatrist so he can prepare you for the test to alleviate the risk of triggering an attack. ...Read moreSee 1 more doctor answer
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Sometimes use both: Dopamine has more affect on blood pressure (raises it). Dobutamine increases heart (myocardial) contractility so it makes the heart muscle beat stronger and subsequently increases cardiac output. They are often used together for people with heart failure and low bp. ...Read moreSee 1 more doctor answer
After taking the Persantine thallium test my dr., informed me of the following; Decreased count rate in the anterior wall; reversible ischemia;;?
Cannot be sure it is: While decreased count in the anterior wall may be caused by ischemia (inadequate blood flow), there are frequently other causes. In females, decreased anterior wall counts may be an artifact due to the interposition of the breast between the camera and the heart. In true ischemia, decreased count would be present only in the stress images. Please confirm this with your physician. ...Read more
Dobutamine: Dobutamine increases cardiac output by reducing systemic vascular resistance and by increasing the rate and force of contraction of the heart. This sometimes results in a higher BP and sometimes in a lower BP so the drug can't be reliably be used to increase BP. Typical doses for CHF are 0-10 mg/kg/minute ...Read more