Heart & EKG Assignment_NicoleLinebaugh
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School
Tallahassee Community College *
*We aren’t endorsed by this school
Course
2086
Subject
Medicine
Date
Feb 20, 2024
Type
pptx
Pages
16
Uploaded by ChiefPonyPerson175
Name: Nicole Linebaugh
N#: N01572555
Heart Anatomy
Note:
For your quiz/exam, you are responsible for knowing all structures on your ID list for both a human heart model AND dissected cadaver/sheep heart, not just the structures you are labeling in this assignment.
You should also be able to answer associated questions about the structures
A. Superior Vena Cava D. Left pulmonary veins B. Brachiocephalic trunk C. Left Subclavian artery Spring 2024
*Note: It is expected that all assignment answers will be based on resources provided for the course.
*After traveling through the vessels indicated by “D”, where would the blood go next?
A. Right Atrium B. Tricuspid valve
D. Mitral Bicuspid valve *valve *valve C. Pulmonary trunk
*after the main vessel divides *chamber
A. Aorta C. Pulmonary trunk D. Left atrium
*cord-like remnant of fetal structure B. Ligamentum arteriosum
*Is the blood located in the vessel indicated by “A” oxygenated OR deoxygenated?
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*
A. What valve
is the blue arrow passing though? Tricuspid Valve
C. Interventricular septum B. Right ventricle *chamber *Is the chamber indicated by “B” part of the pulmonary OR systemic circuit of blood? Pulmonary circuit of blood
B Chordae tendineae.
C. Papillary muscles A. Left atrium *
*chamber *strings *nipple-like projection
*Is this an anterior OR posterior view of the heart? Anterior A. Superior Vena Cava
B. Inferior Vena Cava *Is the blood in the vessels indicated by “A” and “B” oxygenated OR deoxygenated?
Deoxygenated
*Into which heart chamber
do vessels “A” and “B” deliver blood?
Right atrium
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*
B Left ventricle. *chamber *
A. Fossa Ovalis *depression in interatrial septum; remnant of fetal structure *When the chamber indicated by “B” contracts, which vessel
is the blood ejected into?
Aortic semilunar valve
Blood Flow Through the Heart
Paste a screenshot of an image/drawing THAT YOU LABELED
tracing blood flow through the heart. On your image, label ALL structures
AND draw arrows in red and blue to show the flow of oxygenated and deoxygenated blood.
You may label the diagram provided in the module OR create your own drawing for this portion of the assignment.
Starting with the venae cava and ending with blood going out to the body, trace a drop of blood through the heart and lungs naming the following structures
… left atrium, right atrium, left ventricle, right ventricle, bicuspid valve, tricuspid valve, aortic semilunar valve, pulmonary semilunar valve, aorta, pulmonary arteries, pulmonary veins, pulmonary trunk, lungs
1.
Superior/inferior venae cava
2. Right atrium
3. Tricuspid Valve
4. Right ventricle
5. Pulmonary semilunar valve
6. Pulmonary trunk
7. Pulmonary arteries
8. Lungs
9. Pulmonary veins
10. Left atrium
11. Bicuspid valve
12. Left ventricle
13. Aortic semilunar valve
14. Aorta
15. out to the body
*What is the role of the pulmonary circuit of blood? The role of the pulmonary circuit of blood is for gas exchange.
*What is the role of the systemic circuit of blood? The role of the systemic circuit of blood is to carry blood to and from
all of the body tissues.
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Coronary Circulation
Identify vessels of the coronary circulation on the image below and answer the accompanying question.
E. Anterior interventricular artery A. Right coronary artery C. Left coronary artery B. Great cardiac vein D. Circumflex artery *What enlarged coronary vessel on the posterior surface
of the heart delivers deoxygenated blood to the right atrium?
The Coronary Sinus
*blue vessel *red vessel *red vessel
Cardiac Muscle Tissue
A. Nucleus B. Intercalated disc C. Cardiac muscle cell *What 2 types of cells junctions are located within structure “B”? Gap Junctions and Desmosome junctions.
Identify structures on the image below and answer the accompanying question.
*the “stripes” on the cell
Intrinsic Conduction System
Identify components of the conduction system on the image below.
A. Sinoatrial node; Pacemaker B. Atrioventricular node C. Atrioventricular bundle D. Bundle branches E. Purkinje Fibers
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Electrocardiogram (ECG)
*LABEL the ECG components on the tracing below AND answer the questions about what heart event the components correspond to.
*What electrical event do the following components correspond to?
P wave: Atrial depolarization
T wave: Ventricular depolarization
QRS complex: Repolarization
*During which segments of an ECG would the following mechanical heart events occur?
Atrial contraction (atria completely contracted): P-R Interval.
Ventricular contraction (ventricles completely contracted): S-T segment.
B. P wave F. P-R interval E. S-T segment C. T wave A. R-R Interval (QRS complex) G. Q-T interval D. P-R segment
Duration of ECG Components
Using the ECG tracing below, determine the duration (in seconds) of each of the following ECG components... P wave, P-R interval, QRS complex, S-T segment, Q-T interval, T wave. Enter your results in the table on the following slide.
ECG Component
Duration (seconds)
Normal Duration (seconds)
P wave
0.12
0.07-0.18
P-R interval
0.24
0.12-0.20
QRS complex
0.04
0.06-0.12
S-T segment
0.08
< 0.20
Q-T interval
0.36
0.32-0.38
T wave
0.20
0.10-0.25
*Are all the components in their normal range? If not, which one(s) are outside their normal range?
The QRS complex decreased outside of its normal range, and the P-R interval is outside of its usual range.
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Heart Rate Calculation
Determine the duration of the R-R interval on the ECG below and use that to calculate the patient’s heart rate. A: What is this patient’s heart rate? The patients heart rate is -83.3
B: Explain how the duration of the R-R interval changes as heart rate changes. The patient's heartbeat will slow down with increasing distance between them, which determines how long the R-R interval should last.