cardiac
Advanced Health Assessment: Cardiac & Respiratory Systems
Comprehensive study guide for nurse practitioner certification exams focusing on cardiovascular and pulmonary assessment.
Emphasizes clinical findings, differentiation strategies, and critical red flags requiring immediate intervention.
Heart Failure: Left vs. Right Differentiation
Left-Sided Heart Failure
Pathophysiology:
Failure of the left ventricle leads to pulmonary congestion and decreased cardiac output.
Key Clinical Findings:
Dyspnea on exertion
Orthopnea
Paroxysmal nocturnal dyspnea
Pulmonary crackles (rales), especially at lung bases
S3 gallop (ventricular gallop)
Tachycardia
Cool extremities
Frothy pink sputum in severe cases
Exam Pearl:
"Backward failure" causes pulmonary symptoms; "forward failure" causes low perfusion signs.
Right-Sided Heart Failure
Pathophysiology:
Right ventricle dysfunction causes systemic venous congestion and fluid retention.
Key Clinical Findings:
Jugular venous distension (JVD) >3-4 cm at 45°
Peripheral edema: ankles, sacrum (if bedbound)
Positive hepatojugular reflux
Hepatomegaly
Ascites in severe cases
Exam Pearl:
Often results from left-sided failure or chronic lung disease (cor pulmonale).
URGENT REFERRAL:
Acute decompensated heart failure with respiratory distress, hypoxemia, altered mental status, or signs of cardiogenic shock requires immediate emergency department transfer.
Valvular Heart Disease: Auscultation Essentials
1. Aortic Stenosis (AS)
Murmur:
Harsh, crescendo-decrescendo systolic ejection murmur at right upper sternal border (2nd ICS), radiates to carotids.
Associated Findings:
Weak, delayed carotid pulse (pulsus parvus et tardus)
Narrow pulse pressure
S4 gallop
Paradoxical splitting of S2
Classic Triad:
Angina, syncope, dyspnea (indicates severe disease)
Urgent Concern:
Symptomatic severe AS requires cardiology referral and possible valve replacement.
2. Aortic Regurgitation (AR)
Murmur:
High-pitched, blowing diastolic decrescendo murmur at left sternal border (3rd-4th ICS), best heard with patient sitting forward, breath held in expiration.
Associated Findings:
Wide pulse pressure
Bounding "water-hammer" pulses
Displaced PMI
Austin Flint murmur (rumbling diastolic)
Exam Signs:
Head bobbing (de Musset)
Capillary pulsations in nail beds (Quincke)
Pistol-shot femoral pulses (Traube)
3. Mitral Regurgitation (MR)
Murmur:
Holosystolic, blowing murmur at apex, radiates to axilla.
Associated Findings:
Laterally displaced PMI
S3 gallop if severe
Possible atrial fibrillation
Acute vs. Chronic:
Acute MR (papillary muscle rupture post-MI) presents with pulmonary edema; chronic is better tolerated.
4. Mitral Valve Prolapse (MVP)
Murmur:
Mid-to-late systolic click followed by late systolic murmur at apex.
Associated Findings:
Click moves earlier with standing/Valsalva (decreased preload)
Click moves later with squatting (increased preload)
Clinical Note:
Usually benign; may have chest pain, palpitations, anxiety symptoms. Rare complications include severe MR or arrhythmias.
Advanced Cardiac Conditions
Hypertrophic Cardiomyopathy (HCM)
Murmur:
Harsh systolic murmur at left lower sternal border, increases with Valsalva/standing (decreased preload), decreases with squatting/handgrip.
Key Features:
Dynamic left ventricular outflow obstruction
Family history common
Bifid carotid pulse
Exam Alert:
Leading cause of sudden cardiac death in young athletes. Refer for echocardiogram and genetic counseling.
Pulmonic Stenosis
Murmur:
Systolic ejection murmur at left upper sternal border (2nd-3rd ICS)
Wide splitting of S2
Ejection click that decreases with inspiration.
Associated Findings:
Right ventricular heave
Prominent a-wave in JVP
Clinical Context:
Often congenital; mild cases asymptomatic. Severe stenosis causes right heart failure, exertional dyspnea, syncope.
Patent Ductus Arteriosus (PDA)
Murmur:
Continuous "machinery" murmur at left infraclavicular area and upper left sternal border, peaks at S2.
Associated Findings:
Bounding pulses
Wide pulse pressure
Hyperactive precordium
Pediatric Alert:
Common in premature infants. Large shunts lead to heart failure. Closure (surgical/catheter) often required.
Pulmonary Embolism: High-Yield Recognition
Clinical Presentation
Pulmonary embolism (PE) is a life-threatening emergency with variable presentation. Maintain high clinical suspicion in patients with risk factors.
Classic Triad:
Dyspnea (most common symptom, 73%)
Pleuritic chest pain
Hemoptysis
Additional Findings:
Tachypnea (respiratory rate >20)
Tachycardia
Hypoxemia, decreased SpO2
Unilateral leg swelling/pain (DVT)
Anxiety, sense of impending doom
Low-grade fever, crackles, pleural rub
Massive PE Signs:
Hypotension
Syncope
Cardiac arrest
Distended neck veins
Right ventricular strain
Risk Stratification
Wells' Criteria (abbreviated):
Clinical DVT signs (3 pts)
PE most likely diagnosis (3 pts)
Heart rate >100 (1.5 pts)
Immobilization/surgery (1.5 pts)
Prior PE/DVT (1.5 pts)
Hemoptysis (1 pt)
Malignancy (1 pt)
Score >4: PE likely, proceed to imaging.
D-dimer: High sensitivity, low specificity. Useful to rule out PE when low probability and negative result.
IMMEDIATE ACTION REQUIRED:
Suspected PE requires emergency evaluation with CT pulmonary angiography (gold standard) or V/Q scan. Initiate oxygen, IV access, and prepare for anticoagulation. Do not delay imaging in unstable patients.
Respiratory Distress in Infants and Children
Early recognition of respiratory distress in pediatric patients is critical. Compensatory mechanisms can mask severity until sudden decompensation occurs. Assess work of breathing, air movement, and color.
01 Assess Respiratory Rate
Normal Ranges:
Newborn: 30-60 breaths/min
Infant: 25-40 breaths/min
Toddler: 20-30 breaths/min
School-age: 18-25 breaths/min
Adolescent: 12-20 breaths/min
Tachypnea is often the first sign of distress.
02 Observe Work of Breathing
Retractions:
Supraclavicular, intercostal, subcostal. Severity correlates with degree of obstruction.
Nasal flaring: indicates increased effort.
Head bobbing in infants: suggests severe distress.
03 Listen for Abnormal Sounds
Stridor: Inspiratory, upper airway (croup, foreign body).
Wheezing: Expiratory, lower airway (asthma, bronchiolitis).
Grunting: Expiratory, PEEP mechanism (pneumonia, RDS).
04 Check Color and Mental Status
Cyanosis:
Perioral/central indicates hypoxemia.
Pallor: Poor perfusion.
Mental status: Irritability → lethargy progression signals worsening hypoxia and impending respiratory failure.
PEDIATRIC EMERGENCY SIGNS:
Tripod positioning
Inability to speak/cry
Severe retractions with minimal air movement ("silent chest")
Cyanosis despite oxygen
Altered consciousness
Requires immediate emergency transport and airway management.
Special Cardiac Maneuvers for NP Exam
Hepatojugular Reflux Technique
Technique:
Patient supine at 45°, apply firm pressure to right upper quadrant for 10 seconds while observing JVP.
Positive Test:
Sustained rise in JVP >3 cm indicates right heart failure or fluid overload.
Carotid Pulse Assessment Technique
Technique:
Palpate one carotid at a time. Note amplitude, contour, timing with cardiac cycle.
Abnormal Findings:
Weak/delayed (aortic stenosis)
Bounding (aortic regurgitation)
Bifid (HCM).
Isometric Handgrip Technique
Technique:
Patient squeezes examiner's fingers maximally for 20-30 seconds while auscultating.
Effect:
Increases afterload. Augments mitral regurgitation, aortic regurgitation; decreases HCM murmur, MVP click/murmur.
Valsalva Maneuver Technique
Technique:
Patient bears down (like bowel movement) for 10 seconds during auscultation.
Effect:
Decreases preload. Increases HCM murmur, MVP click (moves earlier); decreases most other murmurs. Tests autonomic function.
Respiratory Physical Exam Techniques
1. Inspection
Rate & Pattern:
Count respiratory rate for a full minute. Note depth, rhythm, effort.
Abnormal Patterns:
Cheyne-Stokes (periodic breathing, CHF)
Kussmaul (deep rapid, DKA)
Biot's (irregular, CNS damage).
Chest Configuration:
Barrel chest (COPD, air trapping)
Pectus excavatum/carinatum
Kyphoscoliosis.
Symmetry:
Asymmetric expansion suggests pneumothorax, consolidation, or pleural effusion.
2. Palpation
Tactile Fremitus:
Patient says "ninety-nine" while examining hands on chest.
Increased: Consolidation (pneumonia).
Decreased: Effusion, pneumothorax, COPD, obesity.
Chest Expansion:
Place thumbs at T9-T10 level, assess symmetry.
Reduced on affected side with pneumonia, effusion, atelectasis.
3. Percussion
Normal:
Resonant throughout lung fields.
Dull:
Consolidation, atelectasis, pleural effusion, hemothorax.
Hyperresonant:
Pneumothorax, emphysema, large bullae.
Diaphragmatic Excursion:
Measure distance between full inspiration and expiration.
Normal: 3-5 cm. Decreased in COPD, pleural effusion, ascites.
4. Auscultation
Breath Sounds:
Vesicular (normal peripheral), bronchial (trachea, abnormal if peripheral = consolidation), bronchovesicular (mainstem bronchi).
Decreased/absent: effusion, pneumothorax, severe emphysema.
Adventitious Sounds:
Crackles/rales:
Fine: fibrosis, pulmonary edema;
Coarse: secretions.
Wheezes: airway narrowing.
Rhonchi: secretions (clear with cough).
Pleural friction rub: inflammation.
Urgent Findings Requiring Immediate Referral
Cardiac Emergencies
Acute chest pain with diaphoresis, nausea, radiation to jaw/arm (ACS)
New-onset heart failure with pulmonary edema
Syncope with cardiac murmur or family history of sudden death
Symptomatic severe valvular disease (AS triad)
Hypotension with elevated JVP (cardiogenic shock, tamponade)
New irregular rhythm with hemodynamic instability
Respiratory Emergencies
Sudden dyspnea with unilateral chest pain (pneumothorax, PE)
Respiratory rate >30 or <10, severe hypoxemia (SpO2 <90%)
Stridor in adult (epiglottitis, anaphylaxis, foreign body)
Hemoptysis (massive or with hemodynamic instability)
Inability to complete sentences, tripod positioning
Silent chest with severe asthma/COPD exacerbation
Pediatric Red Flags
Severe retractions with poor air movement
Central cyanosis despite oxygen therapy
Grunting, nasal flaring in infant
Lethargy, decreased responsiveness
Inability to feed due to respiratory distress
Apnea episodes, irregular breathing pattern
General Principle:
When in doubt, refer emergently. Missing a life-threatening condition has far greater consequences than an unnecessary ED visit. Trust your clinical judgment and maintain a low threshold for emergency evaluation with cardiopulmonary complaints.
High-Yield Exam Pearls
Murmur Maneuvers
HCM and MVP are the only murmurs that increase with decreased preload (Valsalva, standing). All others decrease.
Squatting and handgrip increase afterload and help differentiate regurgitant lesions.
S3 vs. S4 Gallops
S3 ("Ken-TUC-ky") = ventricular filling, indicates volume overload (CHF, mitral regurgitation).
S4 ("TEN-nes-SEE") = atrial contraction against stiff ventricle, indicates hypertrophy (HTN, AS).
Important Note: S3 is always pathologic in adults; S4 can be normal in athletes.
Egophony Test
Patient says "eee" while auscultating. Over consolidation, sounds like "ayy" (E-to-A change). Indicates fluid/pus-filled alveoli transmitting sound better. Also positive with pleural effusion at superior border.
Fremitus Pattern Recognition
Think of lung tissue as a sound conductor: solid (consolidation) transmits better = increased fremitus/dullness/bronchial sounds. Air/fluid blocks sound = decreased fremitus/hyperresonance or dullness/absent sounds.
Pediatric Compensation
Children compensate well until they don't. Tachycardia and tachypnea maintain oxygenation initially. Once bradycardia develops or respiratory effort decreases, decompensation is imminent. Normal vital signs do not rule out serious illness in children.
Study Strategy
Focus on distinguishing similar conditions (left vs. right HF, various murmurs), recognizing emergency presentations, and mastering physical exam techniques.
Practice describing findings precisely using correct terminology.
Review normal variants versus pathology, especially in pediatrics.