Critical Care Protocols: MI, CHF, Shock, and IBD Management

ConditionSigns and Symptoms (S&S)Predisposing FactorsAssessment/ClassificationLaboratory FindingsDiagnostic TestsMedications/Initial TreatmentOngoing Management/Interventions

Myocardial Infarction (MI)

  • Chest Pain (CP): Lasting > 20 minutes but < 12 hours.
  • CP described as crushing, gripping, smothering.
  • Feeling of impending doom.
  • Unstable Angina: CP with exertion, not resolved with rest, requiring Nitroglycerin (NTG).
  • C-Reactive Protein (CRP): Indicates degree of atherosclerosis.
  • B-type Natriuretic Peptide (BNP): Elevated in CHF exacerbation.

Initial Assessment & Monitoring

  • EKG monitoring (initially, then every 10 minutes while patient is having CP).
  • Cardiac Enzymes drawn immediately (then Q6H for 24 hours).
  • CK-MB (Creatine Kinase-MB): Cardiac specific; may not rise until 4 hours post-onset.
  • Troponin: Found in skeletal/cardiac muscle; detectable within the 1st hour of onset.
  • Chest X-ray (CXR)
  • Electrocardiogram (EKG)
  • Cardiac Catheterization (Card Cath)
  • Aspirin 325 mg
  • Oxygen
  • Nitroglycerin (NTG) if CP persists.
  • Morphine if pain is not relieved by NTG.
  • Metoprolol (Beta-blocker)
  • Anticoagulation therapy (e.g., Heparin).
  • Admission to Cardiac ICU/Telemetry.

Reperfusion Strategy

  • Start treatment within 6 hours.
  • Thrombolytic Therapy: If symptoms < 12 hours.
  • Contraindications: Active internal bleeding, previous hemorrhagic stroke, pregnancy, recent surgery.

Monitoring Thrombolytics

  • Reperfusion problems (EKG changes: PVCs, VTach, HR changes, pain).
  • Reocclusion (Chest pain, increased Troponin).

PCI/CABG

  • PCI (If contraindications exist): Stent placement (long-lasting); Balloon angioplasty (often for 1st MI, unstable).
  • Monitor post-PCI for Retroperitoneal Bleed.
  • CABG: Indicated for severe Left Main Coronary Artery compromise, triple vessel disease, re-stenosis, or coronary artery rupture.

Congestive Heart Failure (CHF)

  • Orthopnea: Shortness of breath (SOB) when lying flat.
  • Paroxysmal Nocturnal Dyspnea (PND): Sudden SOB at night while sleeping.
  • Fatigue
  • Jugular Venous Distension (JVD)
  • Dependent Edema
  • Common cause: Ischemic Cardiomyopathy.
  • Ischemic Cardiomyopathy (IC) = Coronary Artery Disease (CAD) + Hypertension (HTN).

NYHA Functional Classification

  1. Class I: Strenuous exercise causes symptoms.
  2. Class II: Ordinary activity (e.g., grocery trip) causes symptoms.
  3. Class III: Less than ordinary activity (e.g., cooking dinner) causes symptoms.
  4. Class IV: Symptoms occur at rest.
  • BNP: Shows CHF exacerbation; unreliable alone, can be elevated with inflammatory processes.
  • Echocardiogram (Echo)
  • Chest X-ray (CXR)

Slowing Progression

  • ACE Inhibitors (e.g., Captopril): Monitor Potassium (K) and renal status.
  • Beta-blockers (e.g., Carvedilol): Slows HR and drops BP; ensure HR > 60 bpm before administration.
  • Diuretics (e.g., Lasix/Furosemide).

Ischemic Bowel Disease (IBD)

Symptoms often overlap with assessment findings.

  • Postoperative state
  • Low blood pressure (Hypotension)
  • Atherosclerosis
  • Dark or bright red blood and clots from rectum (Hematochezia).
  • Fever
  • Abdominal pain
  • KUB/X-ray generally not helpful.
  • CT scan with contrast is preferred.
  • Restore circulation to the bowel.
  • Fluid resuscitation as needed (PRN).
  • Antibiotics (Abx) if infection is suspected.

Hypovolemic Shock

  • Low Blood Pressure (BP), Cardiac Output (CO), Cardiac Index (CI), Urine Output (UOP).
  • Mean Arterial Pressure (MAP) < 60 mmHg.
  • High Heart Rate (HR) and Systemic Vascular Resistance (SVR).
  • Hemorrhage
  • Dehydration
  • Burns
  • Vomiting/Diarrhea (V/D)
  • Third Spacing
  • Mental Status: Agitation → Confusion → Coma.
  • Early Respiration: Tachypnea, hyperventilation.
  • Late Respiration: Labored, shallow.
  • Weak, thready pulse.
  • Cool, clammy skin.
  • Urine is dark and concentrated.

Treatment Goals

  • Hemoglobin (Hgb) > 7 g/dL
  • MAP > 60 mmHg
  • Systolic Blood Pressure (SBP) > 100 mmHg

Septic Shock

  • Normal or high Cardiac Output (CO)/Cardiac Index (CI).
  • Pulmonary infiltrates.
  • Slow bowel sounds.
  • Extreme cases: Ischemia/necrosis of extremities.
  • Coagulopathies.

Infection leading to systemic inflammatory response.

  • Early: Level of Consciousness (LOC) changes, increased Respiratory Rate (RR).
  • Fever or low temperature (Hypothermia).
  • Progressive: Third spacing.
  • Higher WBC trend (Note: unreliable in chemotherapy patients).
  • Positive or negative blood cultures (BlCx).

Pathophysiology

  • Thrombotic/fibrinolytic response to infection.
  • Mediator release stimulates an unregulated procoagulant state.
  • Platelet aggregation & adhesion leads to microcirculatory clots (potential for necrosis).

Pancreatitis (Panc)

Cerebrovascular Accident (CVA)

Ascites

Esophageal Varices (Esoph V)