Study Guide for EKG Interpretation and Basic Pharmacology

Introduction

  • This study guide assists in evaluating learning, focusing on EKG interpretation and basic pharmacology.
  • Steps for effective learning:
    • Identify key concepts in the study guide.
    • Organize notes and read chapters.
    • Review online learning sessions, videos, and relevant resources.
    • Test comprehension without resources and compare answers afterward.
    • Schedule weekly reviews to reinforce understanding.

Anatomy and Physiology 1

  • Functions of the Heart: Explain the essential functions performed by the heart.
  • Pericardium: Describe its function and differentiate between fibrous and serous layers.
    • Pericardial space/fluid: Function and significance of pericardial fluid.
Layers of the Heart
  • Three layers:
    • Endocardium: Innermost layer.
    • Myocardium: Muscle layer; unique for intercalated discs and self-depolarization ability.
    • Epicardium: Outermost layer.
Great Vessels
  • Identify great vessels:
    • Describe the function of each:
    • Arteries: Oxygenated (e.g., aorta) vs. deoxygenated (e.g., pulmonary artery).
    • Veins: Vena cavae (deoxygenated) and pulmonary veins (oxygenated).
Chambers of the Heart
  • Names and functions of each heart chamber:
    • Right Atrium: Receives deoxygenated blood from the body.
    • Right Ventricle: Pumps blood to the lungs.
    • Left Atrium: Receives oxygenated blood from the lungs.
    • Left Ventricle: Pumps oxygenated blood to the body.
  • Explain the role of valves and their mechanism of opening/closing.
    • Types of valves:
      • Tricuspid, Pulmonary, Bicuspid, and Aortic valves.
    • Conditions affecting valves: valve insufficiency (prolapse) and stenosis.
Blood Flow through the Heart
  • Describe complete blood flow cycle, including:
    • Path action of blood through each vessel, chamber, and valve.
    • Indicate oxygenation state at each step.
  • Specific vessels and their roles:
    • Arteries, arterioles, capillaries, venules, and veins.

Cardiovascular Parameters

  • Define and provide normal values at rest and during exercise for:
    • Venous return
    • Stroke volume (SV): SV=EDV−ESVSV = EDV - ESV
    • Cardiac output (CO): CO=SVimesHRCO = SV imes HR
    • Ejection fraction (EF): EF=SVEDVEF = \frac{SV}{EDV}
    • End diastolic volume (EDV) and end systolic volume (ESV), and how they may change with exercise.
  • Explain how each parameter affects others, i.e., venous return → EDV → SV → CO.
  • Discussion of autonomic control:
    • Parasympathetic vs Sympathetic: Influence on cardiac rate and contractility.

Electrical Conducting System

  • Describe each component:
    • Sinoatrial node, Atrioventricular node, Bundle of His, Bundle branches, Purkinje fibers.
  • Define electrocardiogram (ECG) wave phases:
    • Resting membrane potential, depolarization, action potential, repolarization, hyperpolarization, roles of sodium and potassium ions in these processes.
Cardiac Cycle and Heart sounds
  • Explain the cardiac cycle events and heart sounds:
    • S1 (closure of AV valves) and S2 (closure of semilunar valves).
  • Explain systolic vs. diastolic murmurs and how to differentiate.

Cardiovascular Pathophysiology

  • Define terms related to heart dysfunction:
    • Pathology, congenital vs. acquired, septal, patent.
  • Explain fetal vs newborn heart function:
    • Mechanisms for receiving blood.
    • Functions of foramen ovale and ductus arteriosus.
  • Understand impacts of failure to close these passages after birth (e.g., Atrial Septal Defect and Ventricular Septal Defect).
  • Hypertension types: Differentiate between systemic and pulmonary.
  • Discuss medication effects: Diuretics, ACE inhibitors, inotropic medications, etc. and their mechanisms.

ECG Interpretation

  • Understand the significance of each wave:
    • P wave (atrial depolarization), PR segment (transmission through the AV node), QRS complex (ventricular depolarization), ST segment (interval between depolarization/repolarization), T wave (ventricular repolarization).
  • Explain what constitutes a positive or negative ECG test result and differences in specificity vs sensitivity.
  • Review heart rhythm conditions (e.g., bradycardia, tachycardia, arrhythmias, asystole).
Additional Concepts and Testing
  • Methods of heart rate determination and the significance of normal vs abnormal findings.
  • Murmurs: Understand their causes and implications in cardiovascular health.
  • Exercise Stress Testing: Reasons, protocols, and potential findings.

Practical Applications

  • Familiarization with heart chamber, valves, and blood vessel location.
  • Understand procedures and indications for medications to prevent and treat hypertension and dysrhythmias.
  • Review common cardiovascular interventions including cardiac catheterization, angioplasty, and bypass surgery.