Random Review CARDIOPULMONARY Flashcards
What does the ABI do?
Compares systolic BP at the ankle and arm to check for peripheral artery disease
What is the formula for ABI?
ABI = Ankle/Brachial
Interpret an ABI >1.4
- Indicates rigid arteries
- Use ultrasound test to check for peripheral artery disease
Interpret an ABI 1.0-1.3
Normal
Interpret an ABI 0.8-0.99
- Mild blockage
- Beginning of PAD
Interpret an ABI 0.4-0.79
- Moderate blockage
- May have intermittent claudication during exercise
- Compression is contraindicated
Interpret an ABI <0.4
- Severe blockage, suggests severe PAD
- May have claudication pain at rest
- Compression is contraindicated
Normal blood pH
7.4 (7.35-7.45)
Normal PaCO2 Arterial Blood Gas
40 mmHg (35-45)
Normal PaO2 Arterial Blood Gas
97 mmHg (80-100)
Normal HCO3- Arterial Blood Gas
24 mEq/L (22-26
SaO2 Arterial Blood Gas
95-98%
Acidemia
Elevated acidity of arterial blood (pH <7.35)
Alkalemia
Decreased acidity of arterial blood (pH >7.45)
Eucapnia
Normal level of CO2 in arterial blood (PaCO2 35-45 mmHg)
Hypercapnia
Elevated level of CO2 in arterial blood (PaCO2 >45 mmHg)
Hypocapnia
Low level of CO2 in arterial blood (<35 mmHg)
Hypoxemia
Low level of O2 in arterial blood (<80 mmHg)
Mild Hypoxemia
60-79 mmHg
Moderate Hypoxemia
40-59 mmHg
Severe Hypoxemia
<40 mmHg
Hypoxia
low levels of O2 in tissue despite adequate perfusion of the tissue
Normal RBC count
Males: 4.3 - 5.6 x10^6/mL
Females: 4.0 - 5.2 x10^6/mL
Normal WBC count
3.54 - 9.06 x10^3/mm^3
Normal platelet count
165 - 415 x10^3/mm^3
Total cholesterol values
Desirable –> <200 mg/dL
Borderline –> 200-239 mg/dL
High –> >240 mg/dL
Which cholesterol is “good”, which one is “bad”?
HDL –> good
LDL –> bad
LDL cholesterol values
Optimal –> <100 mg/dL
Near optimal –> 100-129 mg/dL
Borderline –> 130-159 mg/dL
High –> 160-189 mg/dL
Very high –> >/= 190 mg/dL
HDL cholesterol values
Low –> <40 mg/dL
High –> >/= 60 mg/dL
Triglyceride cholesterol values
Desirable –> <150 mg/dL
Borderline –> 150-199 mg/dL
High –> 200-499 mg/dL
Very high –> >/= mg/dL
Tracheal and bronchial sounds
- Loud, tubular sounds normally heard over the trachea
- Inspiration shorter then expiration w/ a pause between
Note about bronchial sounds
- When heard over distal airways they are abnormal
- Indicate consolidation or compression of lung tissue
Vesicular breath sounds
- High pitched/breezy sounds distally
- Inspiration longer than expiration w/ no pause
Types of abnormal breath sounds
- Adventitious
- Crackle (rales)
- Pleural friction rub
- Rhonchi
- Stridor
- Wheeze
- Bronchial
- Decreased/diminished sounds
- Absent sounds
Adventitious
- Abnormal breath sounds that are heard in addition to the expected breath sounds
- heard w/ inspiration and/or expiration that can be continuous or discontinuous
Crackle (rales)
- Discontinuous, high-pitched popping sound heard usually during inspiration
- Associated w/ restrictive or obstructive respiratory disorders
- Can be “wet” or “dry”
Wet crackle
Usually represents the movement of fluid or secretions
Dry crackle
Sudden opening of closed airways
Conditions to think of when you hear crackles
- Atelectasis
- Fibrosis
- Pulmonary edema
- Pleural effusion
- Pneumonia
- Bronchiectasis
Pleural friction rub
- Dry, crackling sound during inspiration and expiration
- Because of inflamed visceral and parietal pleurae rubbing together
- Heard over the spot of pleuritic pain
Rhonchi
- Continuous low-pitched sounds
- “Snoring” or “gurgling” heard during both inspiration and expiration
- Caused by air passing through obstructed airways
Stridor
- Continuous high-pitched wheeze heard w/ inspiration or expiration
- Indicated upper airway obstruction
Wheeze
- Continuous “musical” or whistling sound w/ a variety of pitches
- Comes from turbulent flow and and the vibration of the walls of small airways
Bronchial breath sounds
- Abnormal when in places that vesicular sounds are supposed to be heard
- Can indicate pneumonia
Decreased/diminished sounds
Less audible sounds can indicate severe congestion, emphysema, or hypoventilation
Absent sounds
May indicate pneumothorax or lung collapse
Voice sounds
Spoken sounds are usually muffled, whispered words are faint
- Bronchophony
- Egophony
- Whispered pectorlioquy
Egophony
- A form of bronchophony
- Spoken long “E” sounds like a long, nasal-sounding “A”
Bronchophony
Increased vocal resonance w/ greater clarity and loudness of spoken words
Increases in volume and distinctness in voice sounds indicate ___?
Consolidation, atelectasis, or fibrosis
Whispered pectorlioquy
Recognition of whispered “1,2,3”
Stethoscope placement for listening to the aortic area
2nd intercostal space at the R sternal border
Stethoscope placement for listening to the pulmonic area
2nd intercostal space at the L sternal border
Stethoscope placement for listening to the mitral area
5th intercostal space, medial to the L midclavicular line
Stethoscope placement for listening to the tricuspid area
4th intercostal space at the L sternal border
S1 heart sound
- “Lub”
- First heart sound
- From closure of the AV valves
- Lower pitch and longer duration than S2
S2 heart sound
- “Dub”
- Second heart sound
- From closure of the aortic and pulmonary valves
- Higher pitch and shorter duration than S1
S3 heart sound
- Vibrations of the distended ventricle walls from passive flow of blood from the atria during the rapid filling phase of diastole
- Normal in healthy young children
- Abnormal in adults, associated w/ heart failure (aka ventricular gallop)
S4 heart sound
- Sound of vibration of the ventricular wall w/ ventricular filling and atrial contraction
- May be associated w/ hypertension, stenosis, hypertensive heart disease or myocardial infarction
- AKA atrial gallop
Heart murmurs
- Vibrations of longer duration than the heart sounds
- Often due to disruption of blood flow
- Sounds like soft blowing or swishing
Normal respiratory rate for newborns-1 year
30 to 60 breaths/minute.
Normal respiratory rate a toddler (age 1-3 years)
24 to 40 breaths/minute
Normal respiratory rate for a child in elementary school (age 6-12 years)
18 to 30 breaths/minute
Normal respiratory rate for an adult (age 18 years and older)
12 to 20 breaths/minute
What does the P wave represent?
Atrial depolarization
What does the PR interval represent?
- Time for atrial depolarization and conduction from the SA node to the AV node
- Normal duration is 0.12-0.20 seconds
What does the QRS complex represent?
- Ventricular depolarization and atrial repolarization
- Normal duration is 0.06-0.10 seconds
What does the QT interval represent?
- Time for both ventricular depolarization and repolarization
- Normal duration is 0.20-0.40 seconds
What does the ST segment represent?
Isoelectric period following QRS when the ventricles are depolarized
What does the T wave represent?
Ventricular repolarization
Normal sinus rhythm
60-100 bpm
Sinus bradycardia
<60 bpm
Sinus tachycardia
> 100 bpm
Sinus arrhythmia
A sinus rhythm that quickens and slows at the SA node, results in a beat-to-beat variation in rate
Sinus arrest
- A sinus rhythm w/ intermittent failure of either SA node impulse formation or AV node conduction
- Results in the occasional complete absence of the P or QRS waves
Atrial dysrhythmias
- Premature atrial contractions
- Atrial flutter
- Atrial fibrillation
Premature atrial contractions
- Occurs when an ectopic focus in the atrium initiates an impulse before the SA node
- P wave will be premature and have abnormal configuration
Clinical significance of PACs
- Common and generally benign
- May progress to atrial flutter, tachycardia or fibrillation
Atrial flutter
- Ectopic, rapid atrial tachycardia
- Atrial rate of 250-350 bpm
- Ventricular rate depends on AV node conduction
What does atrial flutter look like on an ECG?
Saw-tooth shaped P wave
Clinical significance of atrial flutter
- Occurs w/ valvular disease, ischemic heart disease, cardiomyopathy, hypertension, acute myocardial infarction, chronic obstructive lung disease, and pulmonary emboli
- S/S- palpitations, lightheadedness, and angina due to a rapid rate
- Stagnation of blood may predispose to thrombi in the atria
Atrial fibrillation
A common arrhythmia where atria are depolarized 350-600 bpm
What does atrial fibrillation look like on an ECG?
ECG shows characteristically irregular undulations of ECG baseline w/o discrete P waves
Clinical significance of atrial fibrillation
- Can occur in healthy hearts
- Coronary artery disease, hypertension, and valvular disease
- S/S- Palpitations, fatigue, dyspnea, lightheadedness, syncope, and chest pain
- Stagnation of blood may predispose to thrombi in the atria
Degrees of atrioventricular conduction blocks
- 1st degree
- 2nd degree
- 3rd degree
1st degree atrioventricular conduction blocks
PR interval is longer than 0.2 seconds, but relatively consistent from beat to beat
Clinical significance of 1st degree atrioventricular conduction blocks
- No symptoms or significant change in cardiac function
- PR interval may become prolonged for many reasons including medications that suppress AV conduction
2nd degree atrioventricular conduction blocks
- AV conduction disturbance, impulses b/t the atria and ventricles fail intermittently
Types of 2nd degree atrioventricular conduction blocks
- Mobitz type I (Wenckebach)
- Mobitz type II
Clinical significance of Mobitz type I 2nd degree atrioventricular conduction blocks
- Progressive prolongation of PR interval until one impulse is not conducted
- Generally benign
Clinical significance of Mobitz type II 2nd degree atrioventricular conduction blocks
- Consecutive PR intervals are the same and normal, followed by nonconduction of 1+ impulses
- More serious
- May progress to 3rd degree heart block
3rd degree atrioventricular conduction blocks
- All impulses blocked at the AV node
- None transmitted to the ventricles
Clinical significance of 3rd degree atrioventricular conduction blocks
- Medical emergency, PT is contraindicated
- When ventricular rate slows, cardiac output drops and patient may faint
- Common causes: degenerative changes of the conduction systems, digitalis, heart surgery, and acute MI
Ventricular arrhythmias
- Premature ventricular complex
- Ventricular tachycardia
- Ventricular fibrillation
- Ventricular asystole
Premature ventricular complex
- ## Premature depolarization in ventricles due to ectopic focus
Unifocal Premature ventricular complex
Comes from the same ectopic focus and has the same configuration
Multifocal Premature ventricular complex
Comes from different ectopic foci and have different configurations
Clinical significance of PVCs
- Common arrhythmia that occurs in healthy and diseased hearts
- Patient may be asymptomatic or have palpitations