How does anemia cause tachycardia (increased heart rate)?!
Question: What is the mechanism of action in which anemia causes tachycardia?
Please explain the mechanism in detail and please state an internet source.
Answers: What is the mechanism of action in which anemia causes tachycardia?
Please explain the mechanism in detail and please state an internet source.
hii there! :) yea.. totally agree with the madam nurse up there :) if you're anaemic (low RBC count), then low or inadequate oxygen delivered to your tissues and organs, your hypoxic (lack of oxygen) tissues will send signals to your brain that it lacks oxygen and can't function properly. In response, your brain will stimulate your heart to pump faster (tachycardia) inorder to compensate for the lack of oxygen.. so there, thats why you'll be tachycardic as initial short term manifestation.. You see, oxygen is very impt for every single cell in our body inorder to carry out their functions properly.. and this oxygen is delivered via the blood.. thats why there's blood circulation in every inch of our body!! amazing right??! :)
hope i was able to answer your question.. ;p
Try looking up CO = HR x SV .... if your stroke volume decreases the heart rate will go up to equal out the cardio output.
Anemia has nothing to do with Stroke Volume, only with the viscosity of the SV, and a decrease in blood viscosity augments cardiac SV by reducing ventricular afterload. (Marino, ICU 2004) If volume is lost in situations such as Hemorrhagic shock, then tachycardia may exist due to activation of the sympathetic nervous system which increases myocardial contractility and HR. But this is not a prominent response, and lasts transiently, thus tachycardia is not a prominent finding in anemia. (Herbert PC. Physiology aspects of anemia)