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)….
Key Points Initiation at the SA Node: The sinoatrial (SA) node initiates the heart’s electrical impulses, setting the heart’s rhythm. This impulse activates the atria, starting the cardiac cycle. Atrial…
Key Points Definition: Normal sinus rhythm (NSR) refers to the heart’s rhythm when impulses originate from the sinoatrial (SA) node, the heart’s primary pacemaker. This rhythm suggests that electrical impulses…
HPI: 61 year old male with significant cardiac risk factors presents with chest pain that that radiates down both arms. The pain is exertional and improves with rest. His pain…