Discover the fascinating journey of the heart’s electrical impulses! Learn how the sinoatrial (SA) node, the heart’s natural pacemaker, initiates the rhythm that spreads to the atrioventricular (AV) node, ensuring synchronized contractions. Perfect for medical students looking to master cardiac electrophysiology with ease! Hashtags: #HeartElectrophysiology #SANode #AVNode #CardiacRhythm #MedicalStudents #MedicalEducation #CardiologyBasics #HeartFunction #Electrophysiology #MedStudentLife | Medic

#Sinoatrial (SA) node #arrhythmias, also known as sinus node dysfunction or sick sinus syndrome, occur when the heart's natural pacemaker (SA node) doesn't function properly, leading to abnormal heart rhythms. These arrhythmias can include slow heart rates (bradycardia), fast heart rates (tachycardia), or a combination of both, potentially causing symptoms like lightheadedness, dizziness, and fatigue. #education #ECG #doctor #medicalstudent #nurses | Med G

• Sinoatrial Exit Block • Sino-atrial exit block is due to failed propagation of pacemaker impulses beyond the SA node. • The sino-atrial node continues to depolarise normally. • However, some of the sinus impulses are “blocked” before they can leave the SA node, leading to intermittent failure of atrial depolarisation (dropped P waves). | Manual of Medicine