Journal of Cardiovascular Electrophysiology

FEBRUARY 29, 2024

Abstract Introduction Left bundle branch pacing (LBBP) is a physiological pacing modality. However, the long procedure and fluoroscopy time of LBBP is still a problem. This study aims to compare the clinical outcomes between transthoracic echocardiography (TTE)- and X-ray-guided LBBP.

Bradycardia 40

Bradycardia Electrophysiology Outcomes Physiology 40

Ken Grauer, MD

SEPTEMBER 22, 2023

The rhythm is sinus bradycardia at a rate just over 50/minute. Figure-2: The repeat ECG in today's case — recorded as soon as the treating clinician recognized the lead misplacement. ( To improve visualization — I've digitized the original ECG using PMcardio ). All intervals ( PR,QRS,QTc ) are normal.

Blog 174

Blog Chest Pain Bradycardia Physiology 174

Ken Grauer, MD

DECEMBER 23, 2023

Physiologically — the most commonly observed pattern of AFlutter, known as " Typical " AFlutter — produces 2:1 negative deflections seen in the inferior leads ( as seen in Figure-3 ) — as a result of CCW ( C ounter C lock W ise ) rotation of a fixed reentrant circuit around the tricuspid valve annulus and through the cavo-tricuspid isthmus.

Blog 175

Blog Tachycardia Tricuspid Atrial Flutter 175

All About Cardiovascular System and Disorders

MAY 2, 2024

It is a physiological adaptation helping athletes perform physical tasks better than non-athletes. Athlete’s bradycardia due to increased parasympathetic tone and decreased sympathetic tone is a well-known observation. The upper limit of physiologic cardiac hypertrophy in highly trained elite athletes. References 1.Prior

Exercise 40

Exercise Cardiomyopathy Blood Pressure Physiology 40

Dr. Smith's ECG Blog

JANUARY 5, 2024

The ECG shows sinus bradycardia but is otherwise normal. Written by Willy Frick A 46 year old man with a history of type 2 diabetes mellitus presented to urgent care with complaint of "chest burning." The documentation does not describe any additional details of the history. The following ECG was obtained. ECG 1 What do you think?

Angina 121

Angina Plaque Document Stent 121

Dr. Smith's ECG Blog

JANUARY 23, 2024

The physiologic reason for this — is thought to be the result of momentarily increased circulation from mechanical contraction arising from the "sandwiched in" QRS complex. The QRS complex in ECG #1 is wide.

Tachycardia 108

Tachycardia Arrhythmia Heart Disease Sudden Cardiac Death 108

EMS 12-Lead

MARCH 19, 2023

Another factor to be considered, according to Chou’s textbook, is that many patients have dual AVN physiology and conduction is preferential down the fast pathway. This was all very alarming because his baseline routine, otherwise, is unencumbered as he reports a usually high exertional tolerance.

Myocardial Infarction 52

Myocardial Infarction STEMI Coronary Angiogram Coronary Artery Disease 52

Dr. Smith's ECG Blog

OCTOBER 13, 2022

In other cases, the bypass tracts conduct intermittently, depending upon other factors such as cardioactive medication use, physiological stressors with catecholamine release, the development of coronary ischemia, and normal aging.”[3] Delta waves are seen in 11/12 leads.

Chest Pain 52

Chest Pain Myocardial Infarction Ischemia STEMI 52

Dr. Smith's ECG Blog

APRIL 8, 2015

PVCs N ot generally considered abnormal ECG findings: Isolated PAC, First Degree AV Block, Sinus bradycardia at a rate of 35-45, and Nonspecific ST-T abnormalities (even if different from a previous ECG). Thus, if there is documented sinus bradycardia, and no suspicion of high grade AV block, at the time of the syncope, this is very useful.

Arrhythmia 52

Arrhythmia Outcomes Risk Factors Chest Pain 52

Dr. Smith's ECG Blog

MARCH 8, 2025

Within ten minutes, she developed bradycardia, hypotension, and ST changes on monitor. Bradycardia and heart block are very common in RCA OMI. Clearly the physiologic chain reaction of autonomic dysfunction seen in todays case does not commonly lead to death of the person learning this news. I do not know the answer to this.

Cardiomyopathy 76

Cardiomyopathy Myocardial Infarction Defibrillator Bradycardia 76

Dr. Smith's ECG Blog

NOVEMBER 11, 2024

If there is PR prolongation from one to the next, this supports Mobitz I physiology which rarely benefits from pacing. Conversely, if the PR interval is constant , this supports Mobitz II physiology, which is an indication for pacing. This pattern can be seen in both Mobitz I and Mobitz II physiology. History is often helpful.

Arrhythmia 71

Arrhythmia Bradycardia Outpatient Pacemaker 71