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What is the function of the heart?
The main pump of our body
What are the 2 chambers on either side of the heart?
Atrium and ventricle
What does the cardiac cycle do?
Transports blood through the lungs and to all the peripheral tissues of the body
Where does blood transport oxygen and nutrients too?
The tissues
Where does blood transport metabolic waste too?
The kidneys and lungs for elimination
What is the shape of the heart?
Cone-shaped, hollow, muscular organ about the size of a fist
What is the upper (wide) portion of the heart known as?
Base
What is the lower (narrow) portion of the heart known as?
Apex
Where is the location of the heart?
lies behind the sternum and above the diaphragm in the mediastinum
What are the 4 layers of the heart that are supplied by the coronary arteries?
Endocardium, Myocardium, Epicardium, Pericardium
Endocardium
Thin, inner layer
(infections of the heart)
Myocardium
Thick, middle layer
(Responsible for ventricles to squeeze, contract and relax)
Epicardium
Thin, outer layer
(Visceral fluid around)
Pericardium
Fluid filled sac surrounding the heart
(Protects other organs from heart)
What is cardiac myopathy?
When the heart becomes inflamed and large-lead to a thick myocardium
The right atrium receives blood from where?
The superior and inferior venae cava.
Where does the right ventricle pump blood through?
Pumps through the pulmonary artery as deoxygenated blood which then leads it to pulmonary circulation to be oxygenated blood
The left atrium receives blood from where?
From the pulmonary veins
Where does the left ventricle pump blood through?
Pumps through the aorta into systemic circulation
Atrioventricular (AV) valves separate this?
Atria from the ventricles
Tricuspid valve separates this?
Right atrium and the right ventricle
Mitral valve separates this?
Left atrium and the left ventricle
The semilunar valves separate this?
The ventricles from circulation
Pulmonic valves separate this?
The right ventricle from the pulmonary artery
The aortic valve separates this?
The left ventricle from the aorta or from the whole body
What is a cardiac cycle?
The start of one heartbeat to the start of the next heartbeat
What is diastole?
Time of heart relaxation, ventricles fill with blood
During diastole what is happening with the valves?
AV valves are open and Semilunar valves are closed
What is systole?
Ventricular contraction, blood is pushed out into circulation
During systole what is happening with the valves?
AV valves are closed and Semilunar valves are open
What is cardiac output?
The amount of blood the heart pumps out in one minute
What does it mean if the diastole number is higher than the systole number?
Means that the heart is not pumping enough blood and there is no rest for the heart.
What is the Sinoatrial (SA) node?
The pacemaker of the heart
top of heart near atrium
What does the SA node do?
Initiates electrical impulses of the heart in the right atrium
Normally discharges 60-100 times per minute
When does that Atrioventricular (AV) node kick in?
If the SA node is unable to kick in
What happens if the SA node fails?
The AV node will contract at a slower rate of 40-60 bpm
What can the left and right bundle branches do?
Can stimulate contractions if SA and V node fail at a rate of 20-40 bpm
How do the electrical impulses travel from the SA node?
To the AV node, Bundle of His, Bundle branches, Purkinje fibers
Overall results in ventricular contraction
What may patients experience if the conduction system is not functioning properly?
Tachycardia, bradycardia or arrhythmia (dysrhythmias)
Even if the slightest delay of the heart occurs is that a major issue?
Yes
How are normal heart sounds caused?
By the closure of the AV semilunar valves
The 2 normal heart sounds are?
Lub and Dub
What is the Lub or S1 sound?
Closure of AV valves
Heard best at apex
What is the Dub or S2 sounds?
Closure of Semilunar valve
Heard best at base
What is the ventricular gap or s3 sounds?
Faint, low pitched sound heard directly after S2
Can sound like a horses gallop
Who is it typically normal for to have the S3 sounds?
Healthy young adults, typically those who do sports since it means there heart is working extra good
Who is it typically abnormal for to have S3 sounds?
Patients who are older than 40 and is associated with heart failure due to fluid overload
What are S4 sounds?
Soft, thud like sound occurring at end of diastole
Typically heard directly before the S1 heart sound
Where is it best to hear the S4 sounds?
Over the apex of the heart with patient in left lateral position
Why might someone experience S4 sounds?
Caused by the atria working hard to contract against a poorly compliant left ventricle- trying to get that extra blood out
Could be due to scar tissue or normal loss of compliance with age
What are heart murmurs?
Are a swishing or unusually prolonged sounds indicative of turbulent blood flow in the vascular system
What are the types of heart murmurs someone can experience?
Innocent or physiological
Abnormal or pathological
Innocent or physiological heart murmurs?
Not associated with a heart problem, patient is asymptomatic
Abnormal or pathological heart murmurs?
Associated with age related changes or disease, patient may have palpitations or SOB
What is Pericardial Friction Rub?
High-pitched, muffled, grating sound heard with each heartbeat
Why might someone experience pericardial friction rub?
Due to the friction of the visceral and parietal layers of the pericardium
What can Pericardial Friction Rub indicate?
Indicates pericardial inflammation caused by pericarditis or pericardial effusion
Can feel sick and be in pain due to the friction and rubbing experienced
A lipid profile?
Abnormal cholesterol levels are risk a risk factor for CAD
want high HDL levels and low LDL so under 200
A troponin test?
Measures the levels of protein released when damage to heart occurs and this can be elevated a ffew hours to 7 days following a cardiac event
A Electrocardiogram (EKG)?
Records the electrical activity of the heart to help diagnose abnormal rhythms
What is the gold standard EKG?
A 12 lead
A echocardiography?
Ultrasound used to help diagnose structural abnormalities of the heart
See how heart is functioning and operating
A holter monitor?
Ambulatory test of electrical activity worn for 24 hrs to several days
To catch abnormal rhythms and figure out when those symptoms arise
Doing an exercise stress test?
Measures heart function and rhythm while the patient walks on a treadmill
This rapidly increases the heart to see what it does
Alternative options is to give medication
When looking through a family history what should you document about?
Heart disease
Rheumatic fever (affects vessels in heart during early childhood)
High blood pressure
Heart attacks- have members of family passed from this
What medication history should be documented?
Medications like: beta blockers, calcium channel blockers, nitrates, angiotensin enzyme, statins
Non-modifiable risk factors for heart disease?
Age
Sex
Family history
Race
Modifiable risk factors for heart disease?
Smoking
Abnormal cholesterol
High BP
Physical inactivity
Obesity
Stress
Diabetes
Health promotion history for heart disease?
Heart healthy diet
Smoker or alcohol intake (How often and how much)
Exercise
Cardiologist (Why, last visit)
ECG or cardiac diagnostic tests (Results)
In the cardiac system what is the most commonly reported symptom?
Chest pain (angina pectoris)
How is angina pectoris described?
Sudden pain beneath the sternum, often radiating to the left shoulder and arm
When a patient states they have chest pain why is it important to do an in depth assessment?
Patient could be experiencing a myocardial infarction (heart attack)
Use OLDCARTS or OPQRST for assessment
Overall health assessment for those with heart disease?
Heart palpitations are an increased awareness of the heart beating
Can be described as “fluttering”, skipping beats, or heart racing
Related to irregular heart rate, fast heart rate, cardiac abnormality, fear, stress or anxiety
Skin color changes (cyanosis)
Shortness of breath
Edema
Nocturia- due to fluid overload and possible heart failure
Fainting
Risk factors and consideration for those with heart disease?
#1 cause of death in both men and women
1 out of 4 women die from heart disease
No ethnic group os spared the risk of CHD
Steps that should be taken before the assessment begins?
Good lighting is very important to closely inspect the precordium
Room temperature should be comfortable
Patient should be supine with HOB at 30 degrees
Environment should be quiet to clearly hear the heart sounds
Patient should be properly gowned so that only chest area is exposed
The precordium landmarks on the body?
Aortic area, Pulmonic area, Erb’s point, Tricuspid area, Mitral area or Apex
Where is the precordium?
In front of the chest wall
Where is the aortic area?
2nd intercostal space, right sternal border
Where is the pulmonic area?
2nd intercostal space, left sternal border
Where is Erb’s point?
3rd intercostal space, left sternal border
What is the best location to hear heart sounds?
Erb’s point
Where is the tricuspid point?
4th intercostal space, left sternal border
Where is the mitral area or Apex?
5th intercostal space, left midclavicular line (bottom of the heart)
What is the purpose of inspecting the anterior chest?
Assess for pulsations, symmetry and heaves, surgical scars
What is a heave or lift?
A sustained forceful outward, thrusting of the ventricle secondary to increased workload
How should you prepare the room for the patient when assessing the anterior chest?
Adjust head of examination table so patient is playing supine with head and chest elevated 30 degrees
Normal findings when inspecting the anterior chest?
An apical pulsation may or may not be visible at the left 5th midclavicular line
No heaves or lefts
Chest symmetrical
Abnormal findings when inspecting the anterior chest?
A right ventricular heave is visualized at the sternal border
A left ventricle heave is seen at the apex
What is the purpose of palpating the precordium and apical pulse?
Asses for vibrations and the apical pulse
How should you palpate the precordium?
Using the palmar surface of your right hand, gently palpate the five landmarks feeling for pulsations or vibrations
How should you palpate the apical pulse?
Using your 2nd and 3rd finger pads of your dominant hand, palpate the apical pulse at the 5th intercostal space at the midclavicular line noting the location and amplitude
Normal findings when palpating the precordium and apical pulse?
No pulsations are felt at the 5 landmarks
Amplitude: Regular rhythmic tap
Abnormal findings when palpating the precordium and apical pulse?
Visible pulsations
Heaves or lifts
Thrill
What is the purpose of ausculating heart sounds?
To assess for normal, extra or abnormal heart sounds
What are some helpful tips when auscultating for heart sounds?
Use a stethoscope to listen
Listen to and concentrate on one sound at a time
Use a sequence for auscultation, establish a pattern
What positions are acceptable for the patient to be in to listen to heart sounds?
Supine, Semi-Fowlers, Fowlers, Left side lying position
How should you auscultate the heart sounds?
Warm the stethoscope before placing on the precordium
Instruct patient to breathe normally while you listen to the heart
Using your 2nd and 3rd finger pads of your right or left hand, landmark each auscultatory site prior to placing the stethoscope on the skin
Using the diaphragm of the stethoscope auscultate the heart sounds (s1 and s2) at the 5 landmark sites
What do want to listen for when auscultating heart sounds?
S1 and S2 heart sounds
Rhythm of the heart sounds
Abnormal or extra heart sounds
Why should we instruct the patient to lean forward to listen to the aortic and pulmonic valves?
To listen for murmurs or extra heart sounds
How should you listen to the aortic and pulmonic valve areas for heart sounds?
Using the bell of the stethoscope, auscultate for low pitched heart sounds at the 5 landmark sites
Assist the patient to lie on their left lateral side
Using bell of stethoscope, auscultate apical area listening for
Heart murmurs
Extra heart sounds