ecg lbbb-left-bundle-branch-block 
Ken Grauer, MD
MARCH 1, 2024
I was sent the 2 ECGs shown in Figure-1 — which were recorded from an elderly man whose heart beat "has been irregular for years". Regarding the 2 ECGs in Figure-1 : ECG #1 is the initial tracing obtained at the scene by the EMS ( E mergency M edical S ystems ) team — in association with an alert but markedly hypotensive patient.
Ken Grauer, MD
MAY 16, 2024
The ECG in Figure-1 — was obtained from an older man who had just completed dialysis — and , is now complaining of abdominal discomfort that radiates to his chest. The consultant interpreted this tracing as “LBBB” ( L eft B undle B ranch B lock ) — but not indicative of anything acute. Figure-1: The initial ECG in today's case. (
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Ken Grauer, MD
SEPTEMBER 8, 2023
The ECG in Figure-1 — was obtained from an older man with a history of prior infarction and coronary bypass surgery. Figure-1: The ECG in today's case. ( To improve visualization — I've digitized the original ECG using PMcardio ). There is no ECG indication of chamber enlargement — ST-T wave changes do not look acute.
Dr. Smith's ECG Blog
MAY 22, 2024
Written by Sean Trostel MD I returned to my desk after seeing a patient and saw this screening ECG sitting on my desk to be read. ECG #1 @ 15:30 What do you think? QRS is becoming still narrower Note with each ECG there is progressive narrowing of the QRS and dampening of the peaked T-waves. mEq/L. -- A 20 mg neb (most are 2.5
Ken Grauer, MD
MAY 11, 2024
The 12-lead ECG and long lead II rhythms shown in Figure-1 — was obtained from an older man with a recent history of “easy fatiguability” and a presyncopal episode. QUESTIONS: How would YOU interpret the ECG in Figure-1 ? Is the group beating due to the Mobitz I or Mobitz II type of 2nd-degree AV block?
ECG Guru
MAY 24, 2024
ECG Number 1, 11:57 a.m.: There is a wide-complex tachycardia at a rate of about 230 bpm. This photo shows an ECG that is not lying flat, so it is difficult to line up the complexes. The T waves are “discordant”, they are in the opposite direction from the QRS complexes, which is typical of LBBB. The QRS is.15
Dr. Smith's ECG Blog
OCTOBER 21, 2023
This QRS is not typical of any kind of bundle branch block, which makes aberrancy much less likely. Here is a normal LBBB: In LBBB, monophasic wide R-waves should be limited to the lateral leads in left bundle branch block, as in this ECG. Is this sinus tachycardia or VT?
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