physiology-lab.docx - Surname 1 Name Professor Physiology Lab Date Abstract Heart rate variability(HRV between resting and immediately after exercise

physiology-lab.docx - Surname 1 Name Professor Physiology...

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Surname 1Name:Professor:Physiology LabDate:AbstractHeart rate variability (HRV) between resting and immediately after exercise times wasanalyzed from a 20-year-old female using an electrocardiogram. The ECG and pulse data ofthe individual were recorded during a rest and immediately after exercising. Anelectrocardiogram was connected to the individual following Einthoven’s triangle, allowingfor measurements of ECG and pulse data. At rest, the individual’s heartrate was found to be66 bpm, while the recovering heartrate immediately after exercise was found to be 107 bpm.After recovery, the heartrate fell to 74 bpm. Exercising increased the heartrate because moreblood is to be pumped through the heart. As the heartrate increased, the RR interval becameshorter. It was included that the heartrate varied between the resting and after-exerciserecovering times as expected. 1.IntroductionThe electrical impulses of the myocardium in the electrical conduction system in the heartcauses rhythmic heart contractions. The electrical signal originates at the SA node and causescontraction of the atria (Johns Hopkins Medicine, Anatomy and Function of the Heart'sElectrical System). It travels to the AV node and checked before travelling to the musclefibers of the ventricle and causing it to contract (Texas Heart Institute, Conduction System).The electrical activity of the heart is measured using a device called an electrocardiogram(ECG or EKG), which can trace the signals from the SA node as they travel through the heart
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Surname 2(Texas Heart Institute, Electrocardiogram). The electrical impulses in the heart are detected aswaves. The time for a complete cycle on the ECG can be used to determine the period it takesa signal to travel through the heart, and this information can help determine if the heart rate isnormal (American Heart Association, Electrocardiogram (ECG or EKG)). The first wave iscalled the P-wave which is produced by the atria. As the signal passes through the ventricles,a flat line is produced. The QRS complex is produced by the ventricles. The final wave, theT-wave, is produced when ventricles are at rest. In adults, the average heart rate at rest is 60-100 beats per minute (bpm). During exercise, diastoles and systoles are shortened. This isshown on the ECG as reduced RR intervals. When exercising, the average heart rate is termedas the target heart rate zone, and this rate is normally 50-85% of the maximum heart rate. In
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  • Spring '19
  • Dave Larson
  • heart rate

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