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 - ESV
  • Cardiac output (CO): CO = SV imes HR
  • Ejection fraction (EF): EF = rac{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.