Answered: Sketch and discuss the most important…

Sketch and discuss the most important waveforms associated to the cardiac cycle and what is the relationship between the mechanical, electrical and acoustic events

Biomedical Instrumentation Systems

1st Edition

ISBN:9781133478294

Author:Chatterjee

Publisher:Chatterjee

Chapter8: Defibrillators And Pacemakers

Section: Chapter Questions

Problem 1P

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3)Sketch and discuss the most important waveforms associated to the cardiac cycle and what is the relationship between the mechanical, electrical and acoustic events.

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6. Describe the mechanical events of the cardiac cycle (as in Figure 14.18a), including isovolumic ventricular contraction and isovolumic ventricular relaxation (pressure- volume curve of left ventricle, Figure 14.18b). What causes valves to open and close during a cardiac cycle?
1a) Exercise immediately increases end-diastolic volume.True/False b)Mean arterial pressure is a relevant stimulus for the baroreceptor reflex.True/False c)Which of the following would be the most relevant efferent pathway for the regulation of cardiac output by the hormone epinephrine. (baroreceptor, axon, blood, ventricular cells, AV node, brainstem)
4) A) Calculate the Systolic Pressure of a 65 years old man if the diastolic blood pressure is 90 mmHg and stroke volume of 70 ml/beat. Total Peripheral Resistance is 19mmHg.min/L. Assume person is healthy and has a normal heart rate. B) Calculate Left ventricular end-diastolic volume (LVEDV) when the mean ejection fraction is 80 % ?
Select the TRUE statement/s: During the isovolumetric contraction phase in the cardiac cycle, OA) the SL valves are open O B) the intraventricular pressure is increasing O C) the intraventricular volume does not change OD) Both A and C OE) Both B and C
3) which of the following is the correct sequence of events during ventricular systole? 1- AV valves close 2- blood is ejected into the pulmonary trunk and aorta 3- semilunar valves open 4- ventricles begin to relax and enter into ventricular diastole 5- ventricles begin to contract and blood pressure in ventricles increase A) 4,2,3,1,5 B) 4,1,3,5,2 C) 5,1,3,2,4 D) 5,2,3,1,4
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1. In the flow chart provided below, label the structures that lie along the path of blood flow in the heart OR make a similar diagram of your own showing the path of blood in a linear fashion. The top row of boxes (blue) refer to the right side of the heart (unoxygenated blood) and the bottom row of boxes (red) refer to structures in the left side of the heart (oxygenated blood.) (b) 2. Label all the structures indicated by the lines in the diagram below.
Describe the electrical event in the heart that occurs during each of the following: (a) the QRS wave of the ECG; (b) the T wave of the ECG; (c) the P-R interval of the ECG.
22. In the cardiac cycle, the occurrence of the diastole is most likely indicated at which of the following labeled sites on the ECG or phonocardiogram shown? O A) B) D (A) Electrocardiogram (E B Phonocardiogram C) D) E)
As a result of ventricular depolarization (T wave), calcium ions are returned to the sarcoplasmic reticulum and ventricular muscles relax. As the myocardium relaxes, the semilunar valves close. At this time which of the following is true? Group of answer choices (A) ventricular pressure > aortic pressure > atrial pressure (B) atrial pressure > ventricular pressure > aortic pressure (C) aortic pressure > ventricular pressure > atrial pressure (D) aortic pressure > atrial pressure > ventricular pressure
Discuss Mechanical Events of the Cardiac Cycle?
Describe the cardiac cycle and the relationship amongthe contraction of each of the chambers, the opening andclosing of valves, the pressure in each of the chambers,the phases of the electrocardiogram, and the heartsounds.