Lehne's Pharmacology for Nursing Care, 11th Ed., Burchum & Rosenthal, 2022 | Registered Nurse (RN) School Study Aid
Cardiac Enzyme Evaluation: Creatine Kinase CK-MB
- Skeletal or Cardiac Muscle Injury
- Onset: 4-8 Hours
- Peak: 12-24 Hours
- Return to Normal: 2-3 Days
Cardiac Enzyme Evaluation: Myoglobin
- Skeletal or Cardiac Muscle Injury
- Onset: 1 - 4 Hours
- Peak: 12 Hours
- Return to Normal: 24 Hours
- Elevation After 24 Hours: Reinfarction
Cardiac Enzyme Evaluation: Troponin
- Cardiac Muscle Injury
- Detection in Blood: 4 Hours
- Peak: 24 - 36 Hours
- Return to Normal: 5 - 14 Days
- Most Specific for Cardiac Muscle
- Treat Aggressively
Troponin Lab Values
- Troponin T (cTnT)
- < 0.1 ng/mL Normal
- Troponin I (cTnI)
- < 0.5 ng/mL Normal
- > 2.3 ng/mL Myocardial Injury
Myocardial Infarction Assessment
- Substernal Chest Pain
- Crushing or Dull Sensation
- Arm, Jaw, and Neck
- > 20 Minutes
- Unrelieved by Nitro
- Palpitations
- Diaphoresis
- Fear of Impending Doom
- Nausea and Vomiting
- Shortness of Breath
- Monitor for Arrhythmias
Myocardial Infarction Diagnosis
- 12 Lead ECG
- ST Elevation
- Q Wave
- T Wave Inversion
- Troponin T and I
- CK-MB
- Early ECG
- Cardiac Stress Test
Myocardial Infarction Interventions
- Morphine
- Oxygen
- Nitrates
- Aspirin
- Thrombolytics (tPA)
- Cardiac Catheterization
- Stent Placement
- Angioplasty
- Coronary Artery Bypass Grafting (CABG)
- Decrease Modifiable Risk Factors
- Resuming Activity (Physical, Sexual)
Nitroglycerin
- Decreases Preload
- Angina
- Up to 3 doses q 5 mins
- Headache
- Hypotension
- Viagra (Sildenafil)
- Assess Blood Pressure
- Protect From Light
- Use Glass Bottle and Special Tubing
- Gloves for Applying Topically