Management of Patients with Complications from Heart Disease

Management of Patients with Complications from Heart Disease

General Overview

  • Heart Disease Statistics:
    • Cardiovascular disease is the leading cause of death in the United States.
    • Heart disease is a chronic and often progressive condition, linked with serious comorbidities such as heart failure (HF).

Heart Failure (HF)

  • Definition: Heart failure is a clinical syndrome that arises from structural or functional cardiac disorders that impair ventricles' ability to fill or eject blood, resulting in insufficient blood flow to meet metabolic demands.
  • Types of Dysfunction:
    • Systolic Dysfunction: Problem with contraction of the heart.
    • Diastolic Dysfunction: Problem with filling of the heart.
  • Congestion: Can lead to pulmonary or systemic congestion.
  • Reversibility: Some cases of heart failure may be reversible depending on the cause.
  • Management: Typically involves lifestyle changes and medications; most HF is chronic and progressive.

Chronic Heart Failure

  • Incidence: Increases with age; around 6 million people in the U.S. currently have HF with 870,000 new cases diagnosed yearly.
  • Hospitalization: Heart failure is the most common reason for hospitalization for individuals over 65, and 20% of patients discharged after treatment are readmitted within 30 days (nearly 50% within 6 months).

Pathophysiology of Heart Failure

  • Causes of Myocardial Dysfunction:
    • Ischemic heart disease, myocardial infarction, valve disease, alcohol and cocaine abuse, hypertension.
  • Feedback Mechanisms:
    • Activation of the renin-angiotensin-aldosterone system (RAAS).
    • Increased cardiac workload due to elevated systemic blood pressure.
    • Neurohormonal activation leading to increased catecholamines (epinephrine and norepinephrine).
    • Myocardial remodeling, hypertrophy, and impaired contractility.

Types of Heart Failure Symptoms

Left-Sided Failure
  • Clinical Manifestations:
    • Pulmonary congestion with crackles.
    • S3 or "ventricular gallop" sound.
    • Dyspnea on exertion (DOE).
    • Low oxygen saturation.
    • Dry, nonproductive cough initially.
    • Oliguria (decreased urine output).
Right-Sided Failure
  • Clinical Manifestations:
    • Viscera and peripheral congestion (JVD, dependent edema).
    • Hepatomegaly (enlarged liver).
    • Ascites (fluid in the abdominal cavity).
    • Weight gain.

Medical Management

  • Variability: Treatment varies based on severity, comorbidities, and the cause of heart failure.
  • Strategies:
    • Oral and intravenous medications, lifestyle modifications, supplemental oxygen, surgical interventions (e.g., ICD and heart transplant).
    • Emphasis on comprehensive education and counseling for patients and families.

Medications Used to Treat Heart Failure

Oral Medications:
  • Diuretics:
    • Function: Decrease fluid volume.
    • Monitoring: Serum electrolytes.
  • ACE Inhibitors:
    • Functions: Promote vasodilation, facilitate diuresis, decrease afterload & preload.
    • Monitoring: Hypotension, hyperkalemia, and altered renal function; potential cough as a side effect.
  • Angiotensin II Receptor Blockers:
    • Used as an alternative to ACE inhibitors.
  • Beta-Blockers:
    • Used in combination with ACE inhibitors. Effects may take weeks; caution in asthmatic patients.
  • Ivabradine:
    • Function: Decreases SA node conduction rate; observe for decreased heart rate and blood pressure.
  • Hydralazine and Isosorbide Dinitrate:
    • Alternative to ACE inhibitors; watch for decreased blood pressure.
  • Digitalis:
    • Improves contractility; monitor for toxicity, particularly in hypokalemic patients.
IV Medications for Acute Cases
  • Dopamine: Increases BP and myocardial contractility; used alongside loop diuretics.
  • Dobutamine: Enhances cardiac contractility and renal perfusion in left ventricular dysfunction.
  • Milrinone: Decreases preload and afterload but risks hypotension and dysrhythmias.
  • Vasodilators (e.g., IV nitroglycerin, nitroprusside, nesiritide): Enhance symptom relief.

Gerontologic Considerations

  • Atypical Presentation: Older patients may present with fatigue, weakness, and somnolence.
  • Renal Function: Decreased renal function creates resistance to diuretics and sensitivity to volume changes.

Assessment of Patients with Heart Failure

  • Focus Areas:
    • Therapy effectiveness, patient’s self-management, signs and symptoms of worsening HF.
    • Evaluate psychosocial responses; conduct comprehensive health history and physical examinations including monitoring lung sounds and fluid status.

Collaborative Problems and Complications of Heart Failure

  • Potential Complications:
    • Pulmonary edema, hypotension, cardiogenic shock, arrhythmias, thromboembolism, pericardial effusion.

Goals and Planning

  • Therapeutic Goals:
    • Promote activity while managing fatigue; relieve fluid overload symptoms, minimize anxiety, encourage self-management and decision-making skills.
    • Comprehensive education for patients about managing HF.

Nursing Interventions

Activity Promotion
  • Recommendations:
    • Engage in bed rest during acute exacerbations, transition to regular activities as tolerated; pacing to manage fatigue.
    • Avoid extreme temperatures during activity.
    • Positioning to enhance breathing.
Managing Fluid Volume
  • Observations:
    • Monitor for fluid overload symptoms; perform daily weight checks, manage diuretic therapy.
    • Set fluid intake and sodium restrictions.
Patient Education
  • Topics Covered:
    • Medication management, dietary changes (low-sodium diet), exercise programs, recognition of signs of fluid overload and disease exacerbation, and stress management.
    • Family involvement in education.

Specific Complications

Pulmonary Edema
  • Overview: Acute condition indicating failure of physiologic compensatory mechanisms; severe hypoxemia risk.
  • Symptoms: Anxiety, tachycardia, dyspnea, cyanosis, cough with