Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
Bartleby Related Questions Icon

Related questions

Question
Assume: X-axis is time (20mm or 20 small boxes/second) Y-axis is voltage (10 mm or 10 small boxes/1 mVolt)
21
15
22
25
QUE 1) How much time did it take to complete each cycle of contraction? (RR- Interval)
RR #1:
RR#2:
Is this a normal heart rate?_
RR#3:
Average_
Is this sinus bradycardia, normal sinus rhythm, or sinus tachycardia?
QUE 2) How much time was required to pass through the AV Node (and atria)? (PR-Interval)
PR-I #1:
PR-I#2:
_PR-I#3: _
Average=
Would this time increase or decrease if the person developed a 1st degree heart block later in the day?
QUE 3) How much time did the ventricle spend either depolarized or repolarizing? (QT-Interval)
QT-I#1:
_QT-I#2:_
_QT-I#3: _
Average=
If the QT-interval became longer, would the hearts oxygen demands go up or down?
QUE 4) How much time did the heart spend generating force? (ST-Segment)
What are actin and myosin in the cardiomyocytes doing once calcium has allowed troponin to be removed from myosin? (Assume
adequate ATP supplies)
QUE 5) How much time did the heart spend in diastole? (time from end of T-wave to start of next P-wave)
TP#1:
_ TP#2:
_ TP#3:
Average=
If the heart rate increased and the QT-interval was unchanged would the T-P time increase or decrease? WHY?
This is tricky, but helps explain why eventually an increasing heart rate means blood and oxygen supply to the heart actually
DECREASE at the same time the oxygen demand INCREASES.--> This is a frequent cause of exercise induced angina (localized
cardiac hypoxia/ischemia or heart attack).
expand button
Transcribed Image Text:Assume: X-axis is time (20mm or 20 small boxes/second) Y-axis is voltage (10 mm or 10 small boxes/1 mVolt) 21 15 22 25 QUE 1) How much time did it take to complete each cycle of contraction? (RR- Interval) RR #1: RR#2: Is this a normal heart rate?_ RR#3: Average_ Is this sinus bradycardia, normal sinus rhythm, or sinus tachycardia? QUE 2) How much time was required to pass through the AV Node (and atria)? (PR-Interval) PR-I #1: PR-I#2: _PR-I#3: _ Average= Would this time increase or decrease if the person developed a 1st degree heart block later in the day? QUE 3) How much time did the ventricle spend either depolarized or repolarizing? (QT-Interval) QT-I#1: _QT-I#2:_ _QT-I#3: _ Average= If the QT-interval became longer, would the hearts oxygen demands go up or down? QUE 4) How much time did the heart spend generating force? (ST-Segment) What are actin and myosin in the cardiomyocytes doing once calcium has allowed troponin to be removed from myosin? (Assume adequate ATP supplies) QUE 5) How much time did the heart spend in diastole? (time from end of T-wave to start of next P-wave) TP#1: _ TP#2: _ TP#3: Average= If the heart rate increased and the QT-interval was unchanged would the T-P time increase or decrease? WHY? This is tricky, but helps explain why eventually an increasing heart rate means blood and oxygen supply to the heart actually DECREASE at the same time the oxygen demand INCREASES.--> This is a frequent cause of exercise induced angina (localized cardiac hypoxia/ischemia or heart attack).
Expert Solution
Check Mark
Knowledge Booster
Background pattern image
Recommended textbooks for you
Text book image
Human Anatomy & Physiology (11th Edition)
Anatomy and Physiology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Text book image
Anatomy & Physiology
Anatomy and Physiology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Text book image
Human Anatomy
Anatomy and Physiology
ISBN:9780135168059
Author:Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon
Publisher:Pearson Education, Inc.,
Text book image
Anatomy & Physiology: An Integrative Approach
Anatomy and Physiology
ISBN:9780078024283
Author:Michael McKinley Dr., Valerie O'Loughlin, Theresa Bidle
Publisher:McGraw-Hill Education
Text book image
Human Anatomy & Physiology (Marieb, Human Anatomy...
Anatomy and Physiology
ISBN:9780321927040
Author:Elaine N. Marieb, Katja Hoehn
Publisher:PEARSON