Cardiovascular Assessment, Muscle Dysfunction, and Transplantation Notes

Cardiac Muscle Dysfunction and Risk Assessment

  • Cardiac Muscle Dysfunction: Inability of the myocardium to pump blood effectively, leading to reduced cardiac output, fatigue, dyspnea, and exercise intolerance.

  • Dysfunction Types:

    • Systolic dysfunction

    • Diastolic dysfunction

    • Cardiomyopathy

    • Heart failure

    • Ischemic heart disease

  • Risk Factors (ACSM Guidelines):

    • Non-modifiable: Age, sex, family history.

    • Modifiable / Positive Risk Factors: Cigarette smoking, hypertension, sedentary lifestyle, hypercholesterolemia, obesity, diabetes, stress.

    • Fasting blood sugar level: 110 mg/dl110\,mg/dl or more.

    • High HDL cholesterol: Greater than 60 mg/dl60\,mg/dl (protective factor).

  • BMI & Waist Criteria:

    • Underweight: Less than 18.518.5

    • Normal: 18.5−24.918.5 - 24.9

    • Overweight: 25.0−29.925.0 - 29.9

    • More overweight / Obese: 3030 and up

    • High waist girth: 100 cm100\,cm

Clinical Symptom Presentation

  • Chest Pain:

    • Ischemic cardiac pain (angina or MI) associated with dyspnea, sweating, dizziness, syncope, and anxiety.

    • Angina: Sudden or gradual onset. Angina Scale: +1+1 (light), +2+2 (moderate), +3+3 (severe), +4+4 (most severe).

    • Myocardial Infarction (MI): Sudden onset, pain duration greater than 30 minutes30\,minutes.

    • Referred Pain: Radiates to shoulders, arms, neck, jaw, or back.

  • Palpitations: Awareness of heart rhythm abnormalities (skipped beats, extra beats, fluttering, or racing heart).

  • Dyspnea:

    • Dyspnea on exertion

    • Orthopnea: Inability to breathe in a reclining position.

    • Paroxymal nocturnal dyspnea: Sudden inability to breathe during sleep.

    • Dyspnea Scale: +1+1 (mild), +2+2 (mild, some difficulty), +3+3 (moderate difficulty), +4+4 (severe difficulty).

  • Dizziness & Syncope: Transient loss of consciousness due to inadequate cerebral blood flow.

  • Edema: Fluid retention in tissues causing swelling in lower extremities or sudden weight gain.

Cardiovascular Physical Examination

  • Pulse Rate and Rhythm:

    • Palpation duration: 30 seconds30\,seconds for regular rhythm, 1−2 minutes1 - 2\,minutes for irregular rhythm.

    • Influencing factors: Contraction force, blood volume, blood viscosity, vessel diameter, vessel elasticity, emotions, temperature, and hormones.

    • Adult Rate: Average 70 beats per minute70\,beats\,per\,minute (normal range 60−80 beats per minute60 - 80\,beats\,per\,minute).

    • Newborn Rate: Average 120 bpm120\,bpm.

    • Pediatric Rate: 70−170 bpm70 - 170\,bpm.

    • Rate Categories: Tachycardia (greater than 100 bpm100\,bpm), Bradycardia (less than 60 bpm60\,bpm).

    • Pulse Grading Scale: +4+4 (bounding), +3+3 (increased), +2+2 (brisk, expected), +1+1 (diminished), 00 (absent).

    • Abnormalities: Irregular pulse (arrhythmias, myocarditis), Weak pulse (low stroke volume, cardiogenic shock).

  • Pulse Sites & Technique:

    • Apical Pulse / Point of Maximal Impulse (PMI): Patient supine, palpate at 5th5th intercostal space, midclavicular line.

    • Radial: Wrist at the base of the thumb.

    • Carotid: Anterior neck between sternocleidomastoid muscle and trachea.

    • Brachial: Medial aspect of the antecubital fossa (used to monitor BP).

    • Femoral: Inguinal region.

    • Popliteal: Behind the knee with knee flexed slightly (45∘45^\circ).

    • Pedal: Over dorsalis pedis artery on dorsal medial aspect of foot.

Anatomical diagram of cardiac auscultation and palpation areasPalpation of the radial pulse at the wristPalpation of the carotid pulse in the anterior neckLower extremity pulse assessment locations

  • Blood Pressure & Respiration:

    • Pediatric BP (infants under 2 years2\,years): Systolic 106−110 mmHg106 - 110\,mmHg, Diastolic 60−63 mmHg60 - 63\,mmHg.

    • Normal Adult Respiration: 12−20 breaths per minute12 - 20\,breaths\,per\,minute (Pediatric: 30−60 breaths per minute30 - 60\,breaths\,per\,minute).

    • Tachypnea: Greater than 20 breaths per minute20\,breaths\,per\,minute.

    • Hyperpnea: Increase in depth and rate of breathing.

  • Auscultation:

    • Heart Valve Landmarks:

    • Aortic valve: 2nd2nd right intercostal space at sternal border.

    • Pulmonic valve: 2nd2nd left intercostal space at sternal border.

    • Tricuspid valve: 4th4th left intercostal space.

    • Bicuspid / Mitral valve: 5th5th left intercostal space at midclavicular line.

    • Lung Sounds: Crackles, wheezes, and cough assessment (productive vs non-productive).

Peripheral Vascular & Lymphatic Assessment

  • Skin Inspection:

    • Diaphoresis: Excessive sweating associated with decreased cardiac output.

    • Color: Cyanosis (decreased cardiac output/cold), Pallor (decreased peripheral blood flow, PVD), Rubor (dependent redness with PVD).

    • Trophic Changes: Clubbing (O2O_2 deficiency, heart failure), pale/shiny/dry skin with hair loss (PVD), abnormal pigmentation, ulceration, gangrene, dermatitis.

  • Circulatory & Edema Tests:

    • Edema Assessment: Measured using tape.

    • Bilateral Pitting Edema: Congestive heart failure.

    • Unilateral Pitting Edema: Thrombophlebitis / DVT, PVD.

    • Rubor of Dependency: Assesses arterial insufficiency; color return taking longer than 30 seconds30\,seconds indicates arterial insufficiency (normal return within 3 seconds3\,seconds).

    • Intermittent Claudication: Exercise-induced cramping pain in calf and buttocks caused by arterial obstruction, relieved by rest.

    • Doppler Ultrasound: Measures blood flow using an ultrasonic oscillator connected to earphones.

  • Lymphatic System: Examined via lymphoscintigraphy (x-ray of lymph vessels) and palpation of superficial axillary and inguinal nodes.

Diagnostic Tests, Laboratory Values, and Cardiac Rehabilitation

  • Diagnostics:

    • Chest X-ray: Evaluates cardiac shape and size.

    • Myocardial Perfusion Imaging: Thallium scan.

    • Echocardiogram: Visualizes structural function.

    • Cardiac Catheterization: Tube passed through heart into blood vessels to assess vessel integrity, walls, and ventricular function.

    • 12-Lead ECG:

    • P wave: Atrial depolarization.

    • P-R interval: Impulse transmission time from atria.

    • QRS complex: Ventricular depolarization.

    • ST segment & T wave: Ventricular repolarization.

  • Laboratory Values:

    • Arterial Blood Gases (ABGs): pH 7.35−7.457.35 - 7.45.

    • Prothrombin Time: 11−15 seconds11 - 15\,seconds.

    • Enzyme changes (indicative of MI) and lipid profile.

  • Cardiac Rehabilitation:

    • Outcome Measures: 6MWT, Borg RPE, TUG, Sit-to-Stand.

    • Rehabilitation Phases:

    • Phase I: Inpatient.

    • Phase II: Supervised outpatient.

    • Phase III: Community.

    • Phase IV: Independent maintenance.

    • Exercise Precautions: Terminate exercise if chest pain, severe dyspnea, dizziness, syncope, arrhythmias, or unsafe SpO2SpO_2/BP changes occur.

Cardiopulmonary Transplantation

  • Transplantation Overview: Replacement of diseased heart, lung, or heart-lung with donor organs.

  • Process: Referral →\rightarrow Assessment (medical, functional, psychological, nutritional) →\rightarrow Waiting List →\rightarrow Donor Match (blood group, size, compatibility; brain-dead donors most common) →\rightarrow Surgery →\rightarrow Recovery →\rightarrow Follow-up.

  • Surgical Procedures:

    • Heart: Sternotomy and cardiopulmonary bypass.

    • Lung: Single or double lung transplant.

  • Postoperative Care & Rejection:

    • Postoperative Care: ICU care, mechanical ventilation, pain control, early mobilization.

    • Rejection Categories: Hyperacute, Acute, Chronic.

    • Immunosuppression: Steroids; continuous monitoring for side effects.

    • Infection Risks: Bacterial, viral, fungal infections (prevented through hygiene and monitoring).

  • Physiological & Physical Therapy Considerations:

    • Denervation Effects: Leads to higher resting heart rate, slower exercise heart rate response, and diminished cough reflex.

    • Physical Therapy Precautions: Extended warm-up and cool-down periods; continuous monitoring of vitals, SpO2SpO_2, and Borg RPE.

    • Interventions: Breathing exercises, airway clearance, mobilization, strengthening, endurance training, and patient education.