Journal of Cardiovascular Electrophysiology

MARCH 3, 2024

Complete left bundle branch block (CLBBB)-like QRS morphology of right ventricular pacing at pacemaker implantation satisfying the American Heart Association/American College of Cardiology Foundation/Heart Rhythm Society criteria of CLBBB was associated with development of pacing induced cardiomyopathy.

Cardiomyopathy 40

Cardiomyopathy Pacemaker Heart Rhythm Atrial Fibrillation 40

Conquering CHD

JULY 11, 2023

Heart Rate and Rhythm Some medications can slow down or speed up your heart rate. A rapid heartbeat (tachycardia) can increase the workload on your heart, while a slow heartbeat (bradycardia) can cause fatigue and dizziness.

Congenital Heart Disease 52

Congenital Heart Disease Congenital Heart Disease Blood Clot 52

Dr. Smith's ECG Blog

OCTOBER 25, 2023

Syncope and Bradycardia Syncope in a 20-something woman Long QT: Do not trust the computerized QT interval when the QT is long An Alcoholic Patient with Syncope Cardiac Arrest. Is it STEMI? Chest pain in high risk patient. Are these Hyperacute T-waves? What is going on here? What does the ECG show?

Chest Pain 123

Chest Pain Ischemia Cardiac Arrest Blog 123

Physiologically Speaking

JULY 26, 2024

REM Sleep: Each percent increase in nightly REM sleep duration was associated with a lower risk of atrial fibrillation, atrial flutter, and bradycardia (an abnormally slow heart rhythm). Deep sleep: Each percent increase in deep sleep was associated with a lower risk of atrial fibrillation, depression, and anxiety.

Chronic Disease 64

Chronic Disease Physiology Atrial Flutter Atrial Fibrillation 64

Dr. Smith's ECG Blog

JANUARY 30, 2019

Heart Rhythm, 13(7): 1515-1520. [2]: Heart Rhythm, 4(2), 198-199. [6] Heart Rhythm, 15(9): 1394-1401. [7] 7] American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Rhythm Society. Circ Res, 85(9), 803-809. [6]:

Heart Rhythm 52

Heart Rhythm Sudden Cardiac Death Arrhythmia STEMI 52

Dr. Smith's ECG Blog

NOVEMBER 24, 2017

In other words, if the QT is less than 1/2 the RR (QT non -prolonged) and the heart rate is above about 60 beats a minute, you can confidently say the QT is not prolonged. 3) At heart rates below 60, far more caution is due. 6) Use a different rule of thumb for bradycardia : Manually approximate both the QT and the RR interval.

Bradycardia 52

Bradycardia Article Atrial Fibrillation Chest Pain 52

Dr. Smith's ECG Blog

SEPTEMBER 16, 2024

Most Torsades is the result of a pause-dependent effect that predisposes to development of the malignant arrhythmia ( Dohadwala et al — Heart Rhythm Case Rep 3(2):115-119, 2017 ).

Cardiac Arrest 67

Cardiac Arrest Cardiomyopathy Arrhythmia Atrial Fibrillation 67

Dr. Smith's ECG Blog

DECEMBER 5, 2019

Regardless of further evaluation, she should avoid bradycardia, AV nodal blockers, Na channel blockers, and fevers. --If Heart Rhythm 2016. Heart Rhythm 2018. --Genetic testing could be helpful to confirm the diagnosis and allow for screening of other at-risk family members. --EP y (3 of 88, 43.6 ± 37.4

Sudden Cardiac Death 52

Sudden Cardiac Death Heart Rhythm Article Tachycardia 52

Dr. Smith's ECG Blog

JANUARY 21, 2023

This ECG shows a sinus bradycardia with a normal conduction pattern (normal PR, normal QRS, and normal QTc), normal axis, normal R-wave progression, normal voltages. Hypothermia can also produce bradycardia and J waves, with a pseudo-STEMI pattern. Heart Rhythm 2010 Hudzik B, Gasior M. There is marked sinus bradycardia.

STEMI 52

STEMI Bradycardia Arrhythmia Cardiac Arrest 52

Dr. Smith's ECG Blog

FEBRUARY 4, 2025

Perhaps because the bradycardia in vasovagal syncope is only one part of the autonomic response. Phase 4 block is also referred to as "bradycardia dependent block." Heart Rhythm , 6 (8), 12291234. A stunning result. One of many examples in medical history that remind us of the importance of blinding in clinical trials.

Pacemaker 84

Pacemaker Bradycardia Document Heart Rhythm 84