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|
Finger pulse |
|
| start of pulse upswing to peak (s) | Total time (upswinging to baseline, s) |
| 0.090 | 0.240 |
| ECG and Finger pulse | |
| R to start of pulse upswing (s) | T to peak of pulse (s) |
| 0.010 |
0.090 |
1. What do you conclude about the cardiac cycle from your measurements?
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- Finger pulse start of pulse upswing to peak (s) Total time (upswinging to baseline, s) 0.090 0.240 ECG and Finger pulse R to start of pulse upswing (s) T to peak of pulse (s) 0.010 0.090 1. Would the relationship be the same if you had recorded the carotid pulse? Justify your answer. 3. What do you conclude about the cardiac cycle from your measurements?Finger pulse start of pulse upswing to peak (s) Total time (upswinging to baseline, s) 0.090 0.240 ECG and Finger pulse R to start of pulse upswing (s) T to peak of pulse (s) 0.010 0.090 1. Describe the relationships between the ECG, the first and second heart sounds and the finger pulse. 2. Would the relationship be the same if you had recorded the carotid pulse? Justify your answer. 3. What do you conclude about the cardiac cycle from your measurements?Component Amplitude(mV) Duration (s) P wave 0.046 0.07 QRS complex 0.839 0.08 T wave 0.061 0.2 Describe the physiological events in the heart muscle represented by each ECG component (the P wave, the QRS complex, and T wave). Why does the QRS complex have the largest amplitude?
- What would be the fastest possible HR if the absolute refractory period for the cardiac myocyteswas 250 ms?Match the phases of the cardiac cycle given below with the correct corresponding number in the fhigure below. 0.2 04 0.6 0.8 120 100 80+ Pressure changes 60+ 40+ 20+ Left ventricie 120 80 Volume changes 40 V[ Choose ) Isovolumetric contraction 3 Ventricular ejection [ Choose ]In the same BP measurement= 120/80, what is the arterial pressure when the left ventricle is at the peak of its contraction? Choices: 120804093
- a cardiac ultrasound patient is found to have a left ventricle stroke output of 98mL and a resting heart rate of 65bpm, what is the patients cardiac output?The cardiac output of 70-year-old man at rest is 5.5L / min; mean HR is 85 bpm. Left ventricular end-diastolic volume (LVEDV) is estimated to average 85 ml. What is the mean ejection fraction?Results Table 2: Resting and Exercising Cardiac Cycle Length, EDV, and ESV Resting Values Exercising Values Cardiac cycle length (msec) EDV(mL) ESV(mL) Cardiac cycle length (msec) EDV(mL) ESV(mL) Subject 1 839 136 68 452 138 35 Subject 2 831 145 73 392 142 33 Subject 3 855 141 68 414 140 35 Averages 141 70 140 34 Resting and Exercising HR and EDV Strokes/min 450 360 270 Resting Values 180 Exercising Values 90 HR mL 150 120 90 Resting Values 60 Exercising Values 30 EDV
- Relationship between pressure, volume and ECG Pressure (mmHg) Volume (ml) ECG 120 80 40 130 90 50 IVC Aortic valve opens Mitral valve closes Systole ejection EDV Ejection Contraction IVR Aortic valve closes Diastole filling Mitral valve opens Filling ESV Relaxation Filling Aortic pressure Left ventricular pressure Left atrial pressure Left ventricular volume Hint: utilize PV loop to guide you in creating the cardiac cycle diagrams. LVP (mmHg) LV Vol (ml) LVP (mmHg) 100- 0 100 0 150 100 50 Aortic 2 Valve Opening Mitral Valve Closing a b Aortic Valve Closing ESPVR Mitral Valve Opening to 0 Systole Plot the tension in the left ventricle, assuming that only the diameter changes during the cardiac cycle. 3 d 50 ↑ ESV с d C 3 Time a Diastole SV - EDV ------ESV 100 a Aortic Valve Closing Mitral Valve Opening LV Vol (ml) Aortic Valve Opening Mitral Valve b closing EDV EDPVR 150The end systolic volume from an individual’s heart was found to be 50 ml, the end diastolic volume was found to be 110 ml and the heart rate was 90 bpm. What is this individual’s stroke volume, ejection fraction and cardiac output (C.O)? Group of answer choices SV = 60 ml Ejection Fraction = 50% C.O = 3.4 l/min SV = 110 ml Ejection Fraction = 52% C.O = 4.4 l/min SV = 60 ml Ejection Fraction = 55% C.O = 5.4 l/min SV = 160 ml Ejection Fraction = 70 % C.O = 6.4 l/minRelationship between pressure, volume and ECG Pressure (mmHg) Volume (ml) ECG 120 80 40 0. 130 + 90 50+ IVC Aortic valve opens Mitral valve closes Systole ejection EDV Ejection Contraction IVR Aortic valve closes Diastole filling Mitral valve opens Filling ESV Relaxation Filling Aortic pressure Left ventricular pressure Left atrial pressure Left ventricular volume Illustrate and describe the changes in pressure (aortic and lel ventricular) and volume (ventricular) that happen during exercise.
