Overview of First and Second-Degree Atrioventricular (AV) Block Core Characteristics · 1st-Degree: Fixed PR >200ms; 1:1 conduction. · Mobitz I: PR lengthens → QRS drop. · Mobitz II: Fixed PR; sudden QRS drop. Clinical Significance · 1st-Degree & Mobitz I: Often benign; monitor. · Mobitz II: Infranodal; high-risk for progression → pacemaker assessment. #AVBlock #HeartBlock #Cardiology #ECG #EKG #MedEd #MedicalEducation #CardioEd #HeartRhythm #Wenckebach #Mobitz | Abdallah Othman

🫀Complete heart block, aka third-degree atrioventricular (AV) block occurs when there is a complete interruption or blockage in the electrical signals between the upper chambers (atria) and lower chambers (ventricles). Because signals are getting blocked, there is no association between the P waves and the QRS complexes causing them both beat independently of each other. The atria maintain their own rhythm, and the ventricles establish a separate rhythm.⁣ ⁣ 𝗦𝘆𝗺𝗽𝘁𝗼𝗺𝘀⁣ Patients with compl