Mayo Clinic resident Anthony Kashou, M.D., has taken it upon himself to teach health care providers near and far the fundamentals of reading ECGs, all in the name of improved patient care. Anthony Kashou, M.D., is on a mission to improve electrocardiogram education around the globe. And have some fun

Overview: S wave: 1st negative deflection after R wave S waves in precordial leads: [1] Right precordial leads (V1-V2): Term newborn: S waves prominent (up to 23 mm in V1) despite RV dominance 1 week to 1 month of age: S waves ↓ to minimum S waves gradually ↑ with