Bates-Cardio Flashcards
What is PMI?
Point of maximal impulse
Where is the PMI normally located?
5th intercostal space, 7-9cm lateral to midsternal line. (at or just left of mid-clavicular line.
A PMI greater than ____ is indicative of left ventricular hypertrophy.
2.5cm
Displacement of the PMI lateral to the mid-clavicular line or >10cm lateral to midsternal line suggests what?
Left ventricular hypertrophy
In patients with right ventricular hypertrophy, where is the PMI more likely felt?
Near the xiphoid or epigastric area.
Trace the flow of blood through the body from the Right atrium through to the vena cavae
right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary artery, pulmonary veins, left atrium, mitral/ bicuspid valve, left ventricle, aortic valve, aorta, body, inf/sup vena cava, right atrium
During systole, the aortic valve is ____ and the mitral valve is ___
aortic = open
The first heart sound, S1, represents what action?
At the beginning of ventricular systole, the mitral valve snaps shut.
Normally, maximal left ventricular pressure corresponds to ___
Systolic blood pressure
The second heart sound, S2, occurs when ____
The aortic pressure exceeds that of the left ventricle and forces the aortic valve closed
In children and young adults, S3 may arise from ____ and is termed a _____.
- rapid deceleration of the column of blood against the ventricular wall
S3 can be normal in ____ but is usually pathologic in ____.
- normal in children or adolescents
S4 can sometimes be heard, indicating what event?
Atrial contraction
Where does an S4 sound occur?
immediately precedes S1 of the next beat and reflects a pathologic change in ventricular compliance
Where would a systolic murmur be heard? >
Between S1 and S2
Where is a Diastolic murmur heard?
Between S2 and S1.
A “split” S2 suggests what?
may be normal asynchronous closure of Aortic and pulmonary valves with inspiration, Splitting during exhalation could suggest stenosis, cardiomyopathy, or LBBB. If doesn’t change between inspiration or expiration, considered a “fixed split” that suggests septal defect.
Electrical vectors approaching a lead result in what type of deflection?
positive/ upward
Electrical vectors moving away from the lead cause what type of deflection?
negative/ downward
An isoelectric line suggests what
negative and positive deflections cancel each other out creating a flat line.
What does the p wave show?
Atrial depolarization
What is occurring during the QRS complex?
ventricular depolarization
What does the T wave represent?
Ventricular repolarization / recovery
What is preload?
load that stretches the cardiac muscle before contraction (volume in the ventricle at the end of diastole.
What is myocardial contractility?
The ability of the cardiac muscle when given a load, to shorten.
What is afterload?
degree of vascular resistance to the ventricular contraction.
Why is the term “heart failure” preferred over “congestive heart failure” now?
not all patients have volume overload on initial presentation
Name 4 factors that influence arterial pressure:
L ventricular stroke volume, distensibility of the aorta and large arteries, peripheral vascular resistance (esp at arteriolar level), volume of blood in arterial system
Jugular venous pressure reflects pressure where?
Right atrial pressure (which is equal to central venous pressure)
Where is JVP most accurately measured?
Right internal jugular vein (more direct anatomical channel to heart)
What do you find in order to estimate JVP?
highest point of oscillation in internal jugular vein
What is the normal level of head elevation when checking for JVP
supine with head elevated 30 deg.
Chest pain often suggests ____, afecting 15 million people in the US
coronary heart disease
Annual incidence of exertional angina is ____ in the population 30 years or older.
1 in 1000
What term is used to refer to any clinical syndromes caused by acute myocardial ischemia including unstable angina, non-STEMI, and STEMI?
acute coronary syndrome or ACS
Anterior chest pain is often described as tearing or ripping and radiating into the back or neck in what condition?
Acute aortic dissection
What are palpitations?
unpleasant awareness of the heartbeat. May feel like “skipping, racing, fluttering, pounding or stopping”
What is the only arrhythmia that could be reliably identified at the bedside? How does it present?
atrial fibrillation - irregularly irregular
What is orthopnea?
dyspnea that occurs when the patient is lying down and improves when they sit up.
How is orthopnea usually quantified?
According to the number of pillows the patient uses for sleeping.
In what condition s is orthopnea most common?
left heart failure, mitral stenosis, or obstructive lung disease
What is PND?
paroxysmal nocturnal dyspnea -episodes of sudden dyspnea and orthopnea that awaken the patient from sleep around 1-2 hrs after going to bed.
What conditions may commonly present with PND?
Left heart failure, mitral stenosis
What condition may mimick PND?
nocturnal asthma attacks
Interstitial tissue can absorb up to what percent weight gain before pitting edema appears.
10%
Where does dependent edema typically appear?
Lower body parts such a sthe feed and lower legs when sitting, or sacrum if bedridden
In liver and renal disease, edema may be seen where?
periorbtal, hands (nephrotic syndrome), waistline (ascites)
What components make up cardiovascular disease?
congenital cardiovascular defects, stroke, heart failure, heart disease, hypertension
What are the 4 categories of hypertension according to JNC7?
normal, pre-hypertensive, stage 1 hypertension, and stage 2 (extreme) hypertension
What does JNC7 suggest is “indespensible” with regards to HTN management/ prevention?
Adoption of healthy lifestyles by all people.
What is optimal BMI?
18.5-24.9 kg/m2
What is the normal elevation of the head when assessing JVP?
30 degrees
In hypovolemic patients, the JVP will likely be ____ and you may need to ____ to see the point of oscillation.
- low
In hypervolemic patients, the JVP may be _____ and you should ____
high, raise the head of the bed
One major way to differentiate between carotid and Jugular pulsations is what?
Jugular vein pulses cannot be palpated. Additionally, height of pulsations from carotid do not change by position, pressure, or inspiration.
What does increased jugular venous pressure suggest?
right sided CHF, constrictive pericarditis, tricuspid stenosis, or superior vena cava obstruction
What is considered elevated with regards to JVP readings?
pressure >3-4cm above sternal angle, or more than 8-9 cm total distance above right atrium.
What is an elevated JVP reading specific for>
incrased L ventricular end diastolic pressure, and low left ventricular ejection fraction.
What is the usual cause of unilateral distention of the external jugular vein?
local kinking or obstruction.
What would produce a unilateral pulsatile bulge in the neck?
tortuous and kinked carotid artery
Placing pressure on the carotid sinus may result in what?
Reflex drop in HR or blood pressure
What is the pulse amplitude? How could it be described?
it is basically the pulse pressure - may be strong, small, weak, thready, bounding
What is the contour of the pulse?
The speed of the upstroke, duration of the summit, and speed of downstroke.
Delayed carotid upstroke occurs in what disorder?
aortic stenosis
What is a “thrill”?
a humming vibration that may e detected while palpating, associated with the feel of a cat purring
What is a bruit?
an auscultated murmur-like sound of vascular, non-cardiac origin that could suggest blockage
A(n) _______ may radiate to the neck and sound like a carotid bruit
aortic valve murmur
The prevalence of asymptomatic carotid bruits increases with _____/
Age
In what position should your patient be in to pick up low-pitched extra sounds such as S3, opening snap, or diastolic rumble of mitral stenosis?
left lateral decubitus - listen at the apex with the bell of the stethoscope
The soft crescendo diastolic murmur of aortic insufficiency is best heard with your patient in what position?
sitting, leaning forward after full exhalation. listen along L sternal border and apex with the diaphragm
At the apex, is S1 or S2 louder? At the base?
apex = S1 louder
In first-degree heart block, S1 is ____
decreased
In aortic stenosis, S2 is ____
decreased
what is dextrocardia?
a heart situated on the right side of the chest
What is situs inversus?
all major abdominal organs (heart, liver, stomach) are on opposite sides of the thorax from normal.
Dextrocardia with normal liver and stomach is usually associated with what?
Congenital heart disease
In what situations does the PMI differ from the Apical impulse?
Some pathologic conditions may produce a pulsationthat is more prominent than the apex beat such as enlarged right ventricle, dilated pulmonary artery, or aneurysm of the aorta
Lateral displacement of the apical impulse outside the midclavicular line increases likelihood of what?
cardiac enlargement and a low- left ventricular ejection fraction
Pregnancy or high left diaphragm may displace the apical impulse in which direction?
upward and to the left.
In the supine patient, the diameter of the apical impulse usually measures less than ___
2.5cm
In the L lateral decubitus position, a diffuse PMI with a diameter greater than ___ indicates____
3 cm
The amplitude of the PMI is usually described how?
brisk and tapping
An increased amplitude of the PMI may suggest what?
hyperthyroidism, severe anemia, pressure overload of L ventricle, or volume overload of L ventricle
Sustained, low-amplitude impulse at PMI may result from what?
dilated cardiomyopathy