Management of Patients with Structural, Infectious, and Inflammatory Cardiac Disorders

Valvular Disorders
  • Definitions:
    • Regurgitation: The valve fails to close properly, leading to backflow of blood through the valve.
    • Stenosis: The valve does not open completely, resulting in reduced blood flow through the valve.
    • Valve Prolapse: Abnormal stretching of the valve leaflet into the atrium during systole.
The Heart's Valves
  • Main Valves: Mitral, Aortic, Pulmonary, Tricuspid.
Specific Valvular Disorders
  • Mitral Valve Prolapse (MVP): Generally asymptomatic.
  • Mitral Regurgitation: Blood backflows from the left ventricle into the left atrium during systole.
  • Mitral Stenosis: Reduced blood flow from the left atrium to the left ventricle.
  • Aortic Regurgitation: Backward flow of blood into the left ventricle from the aorta during diastole.
  • Aortic Stenosis: Narrowing of the orifice between the left ventricle and aorta.
  • Causes: Inherited connective tissue disorders, rheumatic endocarditis, ischemia, calcification, congenital abnormalities, lesions, syphilis, dissecting aortic aneurysms, and trauma.
Nursing Management of Patients with Valvular Heart Disorders
  • Assessment:
    • Monitor vital signs, heart and lung sounds, and peripheral pulses.
    • Watch for complications like heart failure and arrhythmias, plus symptoms such as dizziness, syncope, and angina pectoris.
    • Perform daily weights; 1 kg1 \text{ kg} weight gain may indicate 1 L1 \text{ L} fluid retention.
  • Interventions:
    • Educate about the condition and treatment options, including the medication regimen.
    • Encourage planned rest periods during activities.
Educating Patients with Mitral Valve Prolapse (MVP)
  • Key Teaching Points:
    • MVP may not be hereditary.
    • Caffeine is tolerated in small amounts.
    • Advise avoidance of alcohol and cessation of tobacco products.
    • Prophylactic antibiotics are not required before dental procedures.
Surgical Management of Valvular Heart Disorders
  • Valvuloplasty (Valve Repair) Procedures:
    • Commissurotomy, Balloon Valvuloplasty, Annuloplasty, Leaflet Repair, Chordoplasty.
  • Valve Replacement Types:
    • Mechanical Valves, Tissue Valves (Bioprosthesis), Homografts, Autografts.
Post-Operative Nursing Management
  • Balloon Valvuloplasty:
    • Monitor for heart failure and embolic events.
    • Assess heart sounds every 44 hours.
    • Provide care similar to post-cardiac catheterization.
  • Surgical Valvuloplasty or Valve Replacements:
    • Focus on hemodynamic stability and recovery from anesthesia.
    • Conduct frequent assessments, especially neurological, respiratory, and cardiovascular systems.
Ongoing Patient Education
  • Educate about anticoagulation therapy, prevention of infective endocarditis, the importance of regular follow-ups, and the need for repeat echocardiograms.
Cardiomyopathy
  • Definition: A progressive disease of cardiac muscle resulting in impaired cardiac output.
  • Types of Cardiomyopathy:
    • Dilated Cardiomyopathy (DCM)
    • Hypertrophic Cardiomyopathy (HCM)
    • Restrictive/Constrictive Cardiomyopathy (RCM)
    • Arrhythmogenic Right Ventricular Cardiomyopathy/Dysplasia (ARVC/D)
    • Unclassified Cardiomyopathy
Clinical Features of Cardiomyopathies
  • Dilated Cardiomyopathy (DCM): Enlarged chambers and systolic dysfunction.
  • Hypertrophic Cardiomyopathy (HCM): Thickened walls leading to diastolic dysfunction.
  • Restrictive Cardiomyopathy (RCM): Stiff heart muscle, leading to diastolic dysfunction.
Assessment of the Patient with Cardiomyopathy
  • History Review: Predisposing factors, family history, chest pain, orthopnea, syncope, and psychosocial impacts.
  • Physical Assessment: Vital signs, pulse pressure, weight changes, heart sounds, pulmonary auscultation (e.g., crackles), and edema.
Complications of Cardiomyopathy
  • Common Problems: Heart failure, ventricular and atrial arrhythmias, conduction defects, embolisms, and valvular dysfunction.
Goals for the Patient with Cardiomyopathy
  • Improve cardiac output and peripheral blood flow.
  • Increase activity tolerance.
  • Reduce anxiety and enhance self-care management.
Nursing Interventions for Cardiomyopathy
  • Improve Cardiac Output: Incorporate rest, proper positioning, supplemental oxygen, medications, and a low-sodium diet.
  • Increase Activity Tolerance: Facilitate a balance of rest and activity; educate patients on symptom recognition to rest appropriately.
  • Reduce Anxiety: Address stressors and aid family understanding regarding their loved one's condition.
Evaluation of the Patient with Cardiomyopathy
  • Maintains or Improves Cardiac Function: Monitor heart rate and respiratory rate, assess dyspnea, check for weight stability, and peripheral blood flow.
  • Activity Tolerance: Encouragement in daily living activities and reporting increased activity tolerance.
  • Psychosocial Assessment: Patient's anxiety levels and coping strategies, including involvement in support groups.
  • Self-Care Management: Ensuring adherence to medication, dietary modifications, and recognizing warning signs.
Infectious Diseases of the Heart
  • Affect any of the three layers: endocardium, myocardium, and pericardium.
  • Diagnosis: Primarily based on symptoms and echocardiographs.
  • Management: Emphasis on prevention; IV antibiotics generally required if heart infections develop.
Types of Infectious Heart Diseases
  • Rheumatic Endocarditis: Often follows Group A beta-hemolytic streptococcal pharyngitis; early recognition and treatment of strep throat is essential for prevention.
  • Infective Endocarditis: Commonly seen in individuals with prosthetic valves, existing structural cardiac defects, IV drug users, and those with long-term catheters.
  • Pericarditis: Inflammation of the pericardium, with complications like pericardial effusion and cardiac tamponade.
  • Myocarditis: An inflammatory process of the myocardium, commonly caused by viral pathogens, leading to complications like cardiomyopathy and heart failure.
Clinical Manifestations of Infectious Diseases of the Heart
  • Key Signs: Fever, new heart murmur, pericardial friction rub, Osler nodes, Janeway lesions, and Roth spots (particularly in rheumatic/infective cases).
  • Myocarditis Symptoms: Cardiomegaly, heart failure signs, fatigue, dyspnea, and chest pain.
  • Diagnostic Tools: Blood cultures, echocardiograms, CBC, rheumatoid factor, ESR, CRP, ECG, cardiac catheterization, TEE, and CT scans.
Prevention of Infectious Diseases of the Heart (Nursing Priorities)
  • Strategies include:
    • Antibiotic prophylaxis before specific procedures.
    • Ongoing oral hygiene.
    • Female advice against the use of IUDs if at risk.
    • Care for patients at risk involving catheters; removal as soon as possible.
    • Ensure timely immunizations.
Case Study: Managing Restrictive Cardiomyopathy Symptoms (Digoxin Toxicity)
  • Patient Scenario: A patient with RCM on digoxin exhibits signs of anorexia, nausea, vomiting, headache, and malaise.
  • Anticipated Care Plan: Reduction in digoxin dosage is expected due to RCM patients' sensitivity to digitalis, indicating