Doctor insights on:
How Does The Brain Control The Heart
Fiberoptic cables: Like phone cords, the brain connects down through the brainstem by tracts like fiberoptic cables connecting the motor/sensory areas of the brain to the areas of the spinal cord sending out nerves to your body. Long and very complex but wonderfully made! ...Read more
Feedback mechanisms: Many things impact bp. Neural stimuli and catecholamine release impact on heart rate and vasoconstriction. Renal blood flow and kidney function control internal fluid and salt regulation, as well as having an influence on hormonal activity and feedback on the nervous system. All of this helps regulate bp. ...Read more
Reset own pacemaker: Assuming query is about cardioversion. There are hierarchies of pacemaker cells in the heart. Fastest one usually takes over. Normal sinus node, then av node or "junction", then purkinje or ventricular pacemakers, in that approximate order. If there is a rhythm disturbance involving a faster abnormal rhythm, an electrical pulse carefully delivered can reset, and allow the fastest normal pacer. ...Read more
By not interfering: A healthy pericardium is a very flexible, thin tissue that is "just there." it generally serves little purpose, other than to allow the chambers of the heart to expand outwards in a normal fashion, without resistance, as they fill with blood. If pericardium becomes inflamed, thickened or hardened, the heart loses this outward mobility, and pressure rises greatly as the heart tries to fill. ...Read moreSee 1 more doctor answer
Trouble for heart: Angina is an uncomfortable sensation from heart muscle suffering from lack of circulation - essentially acute oxygen deprivation. If this deprivation is not corrected, then a heart attack, with permanent heart muscle damage, can follow. Hope that helps. ...Read moreSee 2 more doctor answers
Main artery: The aorta is the main artery in the boday and is responsible for delivering blood to the rest of the body. ...Read more
How EXACTLY does general anesthesia lead to heart attack, stroke or death? What are the mechanisms in the drug that leads to a stroke? How does it kil
No single answer: Serious complications from GA are much more likely in pts who are already sick. If you have coronary artery disease, the stress of surgery and anesthesia can lead to heart attack. If you have already had a stroke, the same stresses can contribute to another. No one drug or technique is at fault. Surgery makes the body tend to form clots as part of healing. This can add to risk of stroke or MI. ...Read more
Millisecond timing: The 2 atria act as reservoirs for returning blood; the 2 ventricles are the "pumpers". The 4 chambers must be coordinated with millisecond timing to maximize the amount of blood pumped (cardiac output). This is done by a network of specialized cells which are found in tracts or bundles that conduct a micro-electrical current to time motion. A gross analogy: think of the distributor in your car. ...Read more
No problem: If you want to find out how the brain works, you can start with one of the standard references: Principles of Neural Science, by Kandel and Schwartz. I have the fifth edition. It's 1709 pages long. It covers the basics. It's an introduction. If you really want to get into the subject, there are more and bigger books you can read. ...Read more
Ensure blood supply: The question is a little vague but i will try to explain. The small arteries to the heart (the coronary arteries) are what supply blood to the hearyt to keep it pumping. The big artery from the heart supplies the systemic circulation. If the small arteries get blocked, then you have a heart attack and may die. Any surgical proceedure may put enough stress on the heart to have a heart attack. ...Read more
ACH effect on BV: M3 muscarinic ach receptors are located in smooth muscles of blood vessels. Because they're gq-coupled & mediate increase in intracellular calcium, they typically cause contraction of smooth muscle (as in bronchi). But activation of m3 on vascular endothelial cells causes increased synthesis of nitric oxide, which diffuses to adjacent vascular smooth muscle cells and causes their relaxation. ...Read more
It destroys lives: Heroin use/addiction destroys many lives, the users and their family and friends, and negatively affect society in general (huge healthcare recourse/cost burden). Some of the effects on the brain itself is pictured here. It also affect your circulatory/respiratory system. Stop it now and seek help--only u can turn your life around. Life is precious. Be good. Be alive! good luck. ...Read moreSee 1 more doctor answer
Besides the circulatory/cardiovascular, the urinary(kidneys) and the nervous(brain and eyes), what systems does it affect?
Clarify: What systems does WHAT affect?Get a more detailed answer ›
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