Chapter 9- Cardiovascular System Flashcards
Occupies the most of the anterior cardiac surface
Right Ventricle
Lies below the junction of the sternum and the xiphoid process
Inferior border of RV
structure at the level of the sternal angle or base of the heart
Pulmonary artery
Forms the lateral left margin of the heart
Left ventricle
Inferior tip of left ventricle is the
Cardiac apex
produces the apical impulse
Cardiac apex
Palpation of the precordium will give you the
Point of maximal impulse
Location of the PMI
Left border of the heart
5th intercostal space
Medial to the left midclavicular line
7-9 cm lateral to the midsternal line
PMI is on the right
Situs inversus
Dextrocardia
In supine patients, diameter of PMI is
1 to 2.5 cm
PMI is greater than 2.5 cm
Left ventricular hypertrophy from hypertension or aortic stenosis
Most prominent palpable PMI in person with COPD
Xiphoid or epigastric area due to right ventricular hypertrophy
If PMI is palpable >10 cm lateral to midsternal line, person has
LVH
Ventricular dilatation from myocardial infarction or congestive heart failure
Reflects right atrial pressure, which in turn equals central venous pressure and right ventricular end-diastolic pressure
Jugular venous Pressure
The JVP is best estimated at
right internal jugular vein (most direct channel to the superior vena cava and right atrium)
Jugular veins and pulsations are difficult to see in?
Children under 12 years old
pressure where the dominant movement is inward coinciding x descent
JVP
Pulse where the dominant movement is outward
Carotid pulse
Fluctuations of the JVP yields clues about
Volume status Right and Ventricular Function Patency of tricuspid and pulmonary valves Pressures in the pericardium Arrhythmias
In order to estimate the level of JVP, one must learn to find
Highest point of oscillation in the internal jugular vein OR
Point above which the external jugular vein collapsed
sternal angle is _____ cm above the right midatrium
5 cm
JVP measured is ELEVATED AND ABNORMAL WHEN?
When JVP is measured above >3cm above the sternal angle of > 8 cm above right atrium
The usual starting position for the head of the bed or examining table when assessing JVP is
30 degrees
In hypovolemic patient, JVP will be? Position of the head to see the point of oscillation best?
Low (0 degrees)
In hypervolemic patients, JVP will be? Position of the head to see the point of oscillation best?
High JVP
Elevate patient’s head @ 60-90 degrees
Interpretation of the measured JVP
JVP at >3 cm above sternal angle or >8cm in total distance above the right atrium is ELEVATED
An elevated JVP is highly correlated with?
Acute and Chronic Heart Failure Tricuspid stenosis Chronic pulmonary hypertension Superior Vena Cava Obstruction Cardiac Tamponade Constrictive Pericarditis
An elevated JVP is >95% specific for
Increased left ventricular and diastolic pressure
Low left ventricular EF
JVP appear elevated on expiration but veins collapse on inspiration
Obstructive lung disease
Pressure in the carotid sinus may cause
Reflex bradycardia
Carotid pulse in cardiogenic shock
Small, thready, weak
Carotid pulse in aortic regurgitation
Bounding
The carotid pulse is delayed in?
Aortic stenosis
Thrills in aortic stenosis are transmitted to the carotid arteries from the?
Suprasternal notch or 2nd right intercostal space
Bruits are caused by
Atherosclerotic luminal stenosis Turtuous carotid artery External carotid arterial Disease Aortic stenosis Hypervascularity of hyperthyroidism External compression from thoracic outlet syndrome
Low-pitched extra sounds such an S3, opening snap indicates
Diastolic rumble of mitral stenosis
Soft-decrescendo higher-pitched diastolic murmur indicates
Aortic regurgitation
rare congenital transposition of the heart is situated in the right chest cavity and generates a right-sided apical impulse
Dextrocardia
The heart, lung, stomach and spleen are on the right, and the liver and gallbladder are on the left
Full situs inversus
Most useful characteristic of the apical impulse for identifying hypertrophy of the left ventricle
Duration
Shift the apical impulse upward and to the left
Pregnancy or High left diaphragm
Lateral displacement toward the the axillary line from ventricular dilatation is seen in?
Heart failure Cardiomyopathy Ischemic heart disease Thoracic deformities Mediastinal shifts
The apex beat is palpable in 25%-40% of adults in the _____ position
Supine position
The apex beat is palpable in 50%-70% of adults in ____ position
Left lateral decubitus position (especially those who are thin)
In the left lateral decubitus position, a diffuse PMI with a diameter of >3 cm signals?
Left ventricular enlargement
A hyperkinetic high-amplitude impulse may occur in?
Hyperthyroidism
Severe anemia
Pressure overload from left ventricle from hypertension or aortic stenosis
Volume overload of the left ventricle from aortic regurgitation
A sustained high amplitude impulse increases the likelihood from
LVH from pressure overload in hypertension
If sustained high-amplitude impulse is displaced laterally, it considers
volume overload
Valves open during systole
Aortic and pulmonic valve
Valves open during diastole
mitral and tricuspid valves
Atypical descriptors of chest pain is common in
women and elderly
Acute aortic dissection description
Tearing, ripping or radiating