Bradycardia Cardiac Arrest Pacemaker 
Dr. Smith's ECG Blog
MAY 5, 2023
My thoughts were the following: ECGs #1 and #2 showed a completely unreliable sinus pacemaker, with presumed high-grade 2nd-degree AV block — and frequent resultant pauses of over 2 seconds ( that would have been even longer had it not been for intermittent relief from the atrial escape focus ). What Does this All Mean?
EMS 12-Lead
MAY 15, 2024
Patient had an unwitnessed cardiac arrest without bystander CPR performed. Crew notifies the received ED of an incoming post-arrest patient and notes a sinus bradycardia on their monitor, as seen in Figure 2. Figure 2 : This rhythm shows a sinus bradycardia at a rate between 30 and 40bpm.
EMS 12-Lead
MARCH 30, 2024
This is demonstrated ( Figure 5 ) by the gap in arrows at the bottom of the strip, signifying that the demand pacemaker has recognized an underlying rhythm (in this case, artifact from a moving ambulance). The artifact fools the pacemaker into thinking the rhythm is native. Current 85mA. They are unable to feel a pulse and resume CPR.
Wellnest
DECEMBER 21, 2022
A fast heartbeat is called tachycardia, while a slow heartbeat is called bradycardia in medical terms. Cardiac arrest Cardiac arrest is a medical emergency in which the heart stops pumping blood to the body. Electrocardiogram, echocardiogram, and some other tests are done for patients with cardiac arrest.
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
FEBRUARY 27, 2023
In fact, sometimes the sinus node is working and acting as a pacemaker but no P waves are visible!! These T-waves are tall but have a narrow base and a corresponding flat ST segment (see lead V4). Also, there are no definite P-waves and this is another result of hyperkalemia. This is called sino-ventricular rhythm. The patient was treated.
Dr. Smith's ECG Blog
APRIL 29, 2020
A 60-something woman presented after a witnessed cardiac arrest. This is commonly found after epinephrine for cardiac arrest, but could have been pre-existing and a possible contributing factor to cardiac arrest. Final Diagnosis: Cardiac Arrest due to Torsades from long QT of unknown etiology.
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