Article Bradycardia Cardiac Arrest 
Dr. Smith's ECG Blog
MAY 19, 2020
There is sinus bradycardia with one PVC. There is "Shark Fin morphology" I saw this and thought for certain that this was going to be an LAD or left main occlusion as etiology of arrest, and etiology of profound ST Elevation in I, II, aVL, and V3-V6, and ST depression in III, V1 and V2. She then had a 12-lead: What do you think?
Dr. Smith's ECG Blog
NOVEMBER 25, 2022
These include ( among others ) — acute febrile illness — variations in autonomic tone — hypothermia — ischemia-infarction — malignant arrhythmias — cardiac arrest — and especially Hyperkalemia. Other Arrhythmias ( PACs, PVCs, AFib, Bradycardia and AV conduction disorders — potentially lethal VT/VFib ).
Dr. Smith's ECG Blog
APRIL 15, 2019
If a patient presents with chest pain and a normal heart rate, or with shockable cardiac arrest, then ischemic appearing ST elevation is STEMI until proven otherwise. An excellent review of myocardial bridging, with full text: [link] Myocardial bridging is when the coronary artery, usually the LAD, dives into the myocardium.
Dr. Smith's ECG Blog
APRIL 8, 2016
There is also bradycardia. Bradycardia puts patients at risk for "pause-dependent" Torsades de Pointes. Torsades in acquired long QT is much more likely in bradycardia because the QT interval following a long pause is longer still. If cardiac arrest from hypokalemia is imminent (i.e., mEq/L, from 1.9
Dr. Smith's ECG Blog
JULY 21, 2024
There was no evidence bradycardia leading up to the runs of PMVT ( as tends to occur with Torsades ). If there had been — a temporary atrial pacemaker could have been considered as a way of increasing the heart rate to suppress a bradycardia-dependent arrhythmia ("overdrive pacing").
Dr. Smith's ECG Blog
NOVEMBER 24, 2017
This article discusses correction of the QT interval for rate. The article is written by Dr. Smith and Dr. Friedman. The rule of thumb is less accurate, and the risk is higher because a long QT in the presence of bradycardia ("pause dependent" Torsades) predisposes to Torsades. now an EM resident at Beth Israel.
Dr. Smith's ECG Blog
MAY 5, 2022
Hyperkalemia causes peaked T waves and the "killer B's of hyperkalemia", including bradycardia, broad QRS complexes, blocks of the AV node and bundle branches, Brugada morphology, and otherwise bizarre morphology including sine wave. Steve, what do you think of this ECG in this Cardiac Arrest Patient?" With a twist.
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