The Cardiac Cycle Is Associated With The Blood Flow Through The Heart

2669 Words Apr 23rd, 2015 11 Pages
Introduction: The cardiac cycle is associated with the blood flow through the heart (Saladin, 2015). The heart rate is a term describing the regularity of the cardiac cycle (Marieb,2007). The heart rate is the amount of times it contracts or also known as beats in a unit of time, nearly always per minute. The normal pulse rate for healthy adults ranges from 60-100 bpm(beats per minute), approximately the adult heart rate regulates 75 bpm but this varies from person to person (Saladin, 2015). The heart rate generally slows down through childhood, as you develop (MacGill, 2015). Abnormal heart rates have medical names and harmless for some (MacGill, 2015). Tachycardia refers to the heart beating too fast at rest being over 100 beats per minute and Bradycardia refers to the heart beating too slow, usually below 60 beats per minute ( MacGill, 2015). The nervous system monitors the body and signals your heart to beat faster in response to increased activity. The normal heart rate undergoes healthy variation, going up in response to some conditions, including exercise, body temperature, body position, and emotion (MacGill, 2015). The blood is rushing around the heart to get rid of deoxygenated blood and carries back oxygenated blood from the lungs (Saladin, 2015) Sounds heard in the cardiovascular system result from the turbulent blood flow (Marieb, 2007). Two sounds can be heard during each cardiac cycle; these sounds are commonly known as "lub" and "dub". The sequence is…
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