Key Points SA Node: Initiates electrical impulses; primary pacemaker (60–100 bpm). AV Node: Slows conduction to permit ventricular filling. Bundle of His: Transmits impulses from the AV node to ventricles;…
Key Points Clinical Context: A normal 12-lead ECG in acute settings does not exclude life-threatening pathologies (e.g., occlusion myocardial infarction [OMI], pulmonary embolism [PE], cardiac tamponade, tension pneumothorax, aortic dissection)….
A 64-year-old male with PMHx of hypertension and hyperlipidemia presents to the ED with chest pain associated with vomiting and shortness of breath. The patient looks sick. The following ECG is…