Key Points Origin and Characteristics: PACs originate from ectopic atrial foci, resulting in abnormal P waves with different morphology and axis compared to sinus P waves. Hidden P Waves: Ectopic…
Key Points Spontaneous Depolarization: Different pacemaker cells in the heart can spontaneously depolarize at varying rates; the SA node is usually the fastest. Ectopic Impulses: Early depolarizations from ectopic foci…
HPI: A 54-year-old woman with PMHx of cardiomyopathy is referred to the ED by her cardiologist who is concerned about an “arrhythmia”. Case ECG Before watching this week’s video,…