Lab 5 ECG and Pulse 2014-02-21a.docx

Lab 5: ECG and Pulse ECG & Pulse DATA REPORT Date: ___/___/___ Student’s Name: Katherine Rumualdo Lab Section: I. Data and Calculations Subject Profile Name: John L07 Age: ______ Height:_____________ Gender: __Male __Female A. Comparison of ECG with Pulse Plethysmogram (Segments 1-3) Complete table with data from three cycles from each segment and calculate the Means. (10 points) Condition Parameter Measure Cycle 1 Cycle 2 Cycle 3 Mean Arm Relaxed Segment 1 R-R Interval ∆ T 1.21 1.18 1.14 1.18 Heart Rate BPM 49.79 51.06 52.86 51.24 Pulse Interval ∆ T 1.21 1.12 1.16 1.16 Pulse Rate BPM 49.59 53.81 51.72 51.71 Temp. Change Segment 2 R-R Interval ∆ T 1.12 1.12 1.00 1.08 Heart Rate BPM 53.80 53.81 59.72 55.78 Pulse Interval ∆ T 1.10 1.12 1.04 1.09 Pulse Rate BPM 54.80 53.56 58.54 55.63 Arm Up Segment 3 R-R Interval ∆ T 1.14 1.14 1.15 1.14 Heart Rate Pulse Interval Pulse Rate BPM ∆ T BPM 52.65 51.97 52.18 52.27 1.15 1.14 1.15 1.147 52.17 53.86 51.95 52.99 B. Relative Volume Changes (Segments 1-3). Complete table with data from each recording segment. (10 points) Condition Parameter Cycle 1 Cycle 2 Cycle 3 Mean Arm Relaxed Segment 1 QRS amplitude 1.23 1.18 1.10 1.17 Pulse Amplitude 0.49 0.44 0.43 0.45 Temp. Change Segment 2 QRS amplitude 1.20 1.10 1.08 1.13 Pulse Amplitude 0.20 0.21 0.21 0.207 Arm Up Segment 3 QRS amplitude 1.22 1.25 1.20 1.22 Pulse Amplitude 0.87 0.84 0.85 0.85 Revised: 2014-02-21

Lab 5: ECG and Pulse C. Calculation of Pulse Speed (10 points) (round to 2 places) Distance between Subject’s sternum and shoulder? ( 24 ) cm Distance between Subject’s shoulder and fingertip? ( 68 ) cm Total distance? ( 92 ) cm Data from Segment 1 of the recording (measure with I-beam) Time between R-wave and Pulse peak: ( 0.49 ) secs Pressure wave speed: ( 92/ 0.49 = 187.76 ) 187.76 cm/sec Data from Segment 2 of the recording (measure with I-beam) Time between R-wave and Pulse peak: ( 0.40 ) secs Pressure wave speed: ( 92/ 0.40 = 230 ) 230 cm/sec Data from Segment 3 of the recording (measure with I-beam) Time between R-wave and Pulse peak: ( 0.50 ) secs Pressure wave speed: ( 92/0.50 = 184 ) 184 cm/sec II. Questions (10 points each) D. Explain the relationship between the pulse recorded in the finger and heart muscle contraction During the contraction of the heart, the blood is ejected from the heart into the aorta. Then the pressure wave travels through the peripheral system and the fingertip is one of those peripheral system endpoints. E. Which components of the cardiac cycle (atrial systole and diastole, ventricular systole and diastole) are discernible in the pulse tracing? ventricular systole and ventricular diastole F. Does raising the arm affect the frequency and amplitude of the ECG? Explain the physiological mechanism underlying this phenomenon. Raising the arm should not change the amplitude of the ECG but it will affect the frequency, because a raised arm can increase venous return or just us exerting effort to raise the arm or the ventilatory rate changes that affects frequency. G. How would you explain the change in pulse amplitude in one arm when changing the temperature in the other one arm? It's a closed circut so if we have constriction in one arm it will change blood flow into the other arm which will change the pulse amplitude. Revised: 2014-02-21