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Cardiac Conduction Pathway, Slides of Medicine

Universiti MalayaMedicine

**Cardiac Conduction Pathway – Medical Presentation Slides** A concise and well-structured presentation covering the **Cardiac Conduction Pathway**, designed for medical students, healthcare trainees, and postgraduate learners. Key topics include: * Normal cardiac electrical impulse generation and propagation * Components of the cardiac conduction system * Correlation with ECG findings * Physiological regulation of heart rhythm * Common conduction abnormalities and their clinical significance Ideal for lectures, tutorials, exam revision, case discussions, and self-directed learning. The content is presented in a clear, visually engaging format to support understanding of fundamental cardiovascular concepts and clinical applications. **Suitable for:** Medical students, nursing students, allied health professionals, residents, and educators.

Typology: Slides

2021/2022

Available from 06/08/2026

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HOW DOES MY HEART
BEAT?
RAUDAH BUNARI
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HOW DOES MY HEART

BEAT?

RAUDAH BUNARI

THE CARDIAC CONDUCTION SYSTEM

• CARDIAC CONDUCTION SYSTEM COORDINATES ALL THE
FOUR CHAMBERS OF THE HEART
• IT CONSIST OF:
- SINOATRIAL NODE
- ATRIOVENTRICULAR NODE
- BUNDLE OF HIS (LEFT AND RIGHT BRANCH)
- PURKINJE FIBERS

Regularity

  • (^) Regularly

irregular

  • (^) Irregularly

irregular

Rate

  • (^) Tachyarrhyth

mia

  • (^) Bradyarrhyth

mia

Origin

  • (^) Supraventric

ular

  • (^) Ventricular

Cardiac Conduction

Defect Arrhythmias

TACHYARRHYTHMIAS

TACHYARRHYTHMIAS:

Sinus Tachycardia Supraventricular Tachycardia

  • (^) SA nodes send impulses faster than usual In response to increase body need for cardiac output
  1. Fever
  2. Sepsis
  3. Exercise
  4. Thyrotoxicosis
    • (^) Most common abnormal tachycardia in children
    • (^) Rate varies : 220-230 bpm (neonates), 180-190 bpm (children)
    • (^) Presentation: irritable or palpitations

SUPRAVENTRICULAR TACHYCARDIA

  • (^) 3 MAJOR TYPES:
  • (^) RE-ENTRANT TACHYCARDIA WITH AN ACCESSORY PATHWAY AVRT/ WOLFF PARKINSON WHITE SYNDROME MOST COMMON SVT IN INFANTS
  • (^) RE-ENTRANT TACHYCARDIA WITHOUT AN ACCESSORY PATHWAY (AVNRT)
  • (^) ECTOPIC/AUTOMATIC TACHYCARDIA ATRIAL ECTOPIC TACHYCARDIA, MULTIFOCAL ATRIAL ECTOPIC

AV Node re-entrant tachycardia

MANAGEMENT OF SVT

Pharmacological

  • IV Adenosine 0.1-0.5mg/kg
  • Consider sync DC in unstable Non Pharmacological

Vasalva maneuver

  • (^) Ice pack on the face
  • (^) Carotid sinus massage

BRADYARRHYTHMIA

CAUSES:

  • (^) PRIMARY: CONGENITAL OR POST SURGICAL, CARDIOMYOPATHY AND MYOCARDITIS
  • (^) SECONDARY:
  1. HYPOXIA
  2. HYPOTENSION
  3. HYPOTHERMIA
  4. H IONS (ACIDOSIS)
  5. HYPERKALEMIA
  6. TRAUMA
  7. TOXINS

HEART BLOCK

Interruption in the

electrical

transmission

either completely

block or partially

FIRST DEGREE HEART BLOCK

SECOND DEGREE HEART BLOCK

MANAGEMENT

MEDICATIONS

• ESPECIALLY IN 2ND^ DEGREE BLOCK
• IV ADRENALINE/ IV ISOPRENALINE/ IV ATROPINE
  • (^) PACING