Journal of Cardiovascular Electrophysiology

JANUARY 4, 2024

Abstract Introduction Dual atrioventricular nodal non-reentrant tachycardia (DAVNNT) is a rare and challenging-to-diagnose arrhythmia, without previous reports associating it with a leftward inferior extension (LIE). Methods Diagnosis was made using adenosine triphosphate (ATP) injection during atrial pacing in a suspected DAVNNT patient.

Tachycardia 40

Tachycardia Physiology Ablation Arrhythmia 40

Frontiers in Cardiovascular Medicine

JANUARY 25, 2024

It is frequently driven by physiologic factors such as hypotension, tachycardia, and anemia. Perioperative myocardial injury is a relatively common complication after noncardiac surgery associated with significant morbidity and mortality.

Myocardial Infarction 64

Myocardial Infarction Physiology Tachycardia Risk Factors 64

Frontiers in Cardiovascular Medicine

DECEMBER 9, 2024

BackgroundPregnancy increases the risk of supraventricular tachycardia (SVT) due to physiological changes. This study reviews the management of SVT in pregnant patients in the emergency department (ED).MethodsWe

Physiology 52

Physiology Tachycardia Hospital Research 52

The British Journal of Cardiology

DECEMBER 3, 2024

A 74-year-old man with a heterotopic heart transplant experienced alternating episodes of sustained native heart ventricular tachycardia and prolonged asystole. The unique physiology in such patients lends itself to numerous clinical considerations that would otherwise be routine management for most.

Heart Transplant 40

Heart Transplant Transplant Pacemaker Physiology 40

MIBHS

JANUARY 31, 2025

The Role of Wearable Technology in Heart Health Wearable tech is designed to monitor physiological data and provide actionable insights to users. Early detection of conditions like AFib, bradycardia, or tachycardia allows patients to address issues before they become critical.

Heart Rhythm 52

Heart Rhythm Technology AFIB Exercise 52

Circulation

NOVEMBER 11, 2024

Introduction:Supraventricular tachycardia (SVT) is common and poorly tolerated in patients who have undergone Fontan procedure. Atrial Tachycardia (70%) and Typical Atrial Flutter (65%) were the most common SVTs ablated. Circulation, Volume 150, Issue Suppl_1 , Page A4142266-A4142266, November 12, 2024.

Ablation 40

Ablation Atrial Flutter Outcomes Arrhythmia 40

Dr. S. Venkatesan MD

JUNE 16, 2024

Like hemodynamics of blood , an “electro-dynamic” flow cycle exists that is critically important both in physiology and pathology. Now in modern electro-physiology, it is time to teach young cardiology fellows a new rule of thumb, always look for the (mid )diastolic electrical flow in any scar-induced VT. 2020;13:e008651.

Ablation 52

Ablation Physiology Technology Bicuspid/Mitral 52

Dr. Smith's ECG Blog

NOVEMBER 26, 2018

2) Tachycardia to this degree can cause ST segment changes in several ways. First , there can simply be diffuse ST depressions (which obligates reciprocal STE in aVR) associated with tachycardia which are not indicative of ischemia. Sometimes you must correct the rhythm to see what lies underneath. Is this inferor STEMI?

Ischemia 52

Ischemia Atrial Flutter Arrhythmia Tachycardia 52

Open Heart

APRIL 7, 2022

Those with sinus tachycardia were treated with beta-blockers and those with ventricular hypertrophy received a beta-blocker and ACE-inhibitor combination. One manifest physiological, sinus pauses >3.5 s during sleep and another had one asymptomatic episode of non-sustained ventricular tachycardia.

Arrhythmia 40

Arrhythmia ACE Inhibitor Download Tachycardia 40

Dr. Smith's ECG Blog

DECEMBER 26, 2020

Tachycardia and ST Elevation. Tachycardia to this degree can cause ST segment changes in several ways. First, there can simply be diffuse STD (which obligates reciprocal STE in aVR) associated with tachycardia, which are not even necessarily indicative of ischemia. Christmas Eve Special Gift!! Is this inferor STEMI?

Atrial Flutter 52

Atrial Flutter Ischemia STEMI Tachycardia 52

EMS 12-Lead

AUGUST 22, 2022

From afar, there is gross tachycardia, cadence irregularities, and narrow QRS complexes that may, or may not, be Sinus in origin; and finally – a cacophony of wide complexes that might very well be ventricular in origin. McLaren : We’ve answered the first question – Sinus Tachycardia with episodic runs of wide QRS (RBBB morphology) and PVC’s.

Tachycardia 52

Tachycardia Cardiomyopathy Electrophysiology ICU 52

Circulation

NOVEMBER 10, 2023

Physiologic resynchronization by LBBAP may be associated with lower risk of arrhythmias compared with BVP. The incidence of AF lasting >24 hours was also significantly lower with LBBAP compared with BVP (0.7% Conclusions:LBBAP was associated with lower incidence of sustained VT/VF and new-onset AF compared with BVP.

Atrial Fibrillation 40

Atrial Fibrillation Pacemaker Physiology Heart Failure 40

Dr. Smith's ECG Blog

MARCH 12, 2018

The findings include sinus tachycardia, characteristic QRS morphology most diagnostic in V3 with a small R wave followed by a very large S wave with a convex upward ST segment morphology, ST segment strain morphology in the inferior and anterior leads leading to deep symmetric T-wave inversion. and tachycardia, 1.8. incomplete RBBB 1.7

Chest Pain 40

Chest Pain Pulmonary Embolism Tachycardia 40

Dr. Smith's ECG Blog

OCTOBER 10, 2022

The ECG accurately reflects the physiologic state of the underlying myocardium, but there is always more than one possible etiology of that physiologic state. Tachycardia is of course, quite common in patients following cardiac arrest. As a result — the history will often be limited to what was known prior to the arrest.

Cardiac Arrest 52

Cardiac Arrest Chest Pain Embolism Pulmonary 52

Dr. Smith's ECG Blog

JANUARY 6, 2024

The atrial rate is around 120 beats per minute, which indicates high adrenergic state and physiologic distress! This is sinus tachycardia (rhythm) with complete heart block (AV node function) with ventricular escape rate just below 30. Never forget that sinus tachycardia is the scariest arrhythmia.

Blog 111

Blog Ischemia Tachycardia STEMI 111

Dr. Smith's ECG Blog

FEBRUARY 28, 2020

Tachycardia (or nearly) 2. Tachycardia, = 1.8. Finally , they found these independent predictors of PE: Note that tachycardia only has an Odds ratio of 1.8. Tachycardia is unusual in ACS unless there is cardiogenic shock or a second simultaneous pathology. Some providers were worried about ACS because of this ECG.

Chest Pain 52

Chest Pain Pulmonary Tachycardia Embolism 52

Dr. Smith's ECG Blog

FEBRUARY 6, 2023

The follow-up ECG ( done ~6 hours after ECG #1 ) — supports my suspicion regarding the physiologic sequence of events in today's evolving OMI ( and provides the likely explanation for why frank ST elevation was not seen in ECG #1 ). There is sinus tachycardia at 100-105/minute. Figure-1: Comparison of the first 3 ECGs in today's case.

Chest Pain 52

Chest Pain Physiology Blog Stents 52

EMS 12-Lead

MAY 8, 2022

2] But there is also Sinus Tachycardia! Physiology. Chapter 4: Cardiovascular Physiology. This is critical for the EMS provider, or ED clinician, as identification of Grade I ischemia (aka, HATW’s) addresses the culprit lesion at the earliest opportunity with excellent downstream prognosis for the patient. [2] 3] Costanzo, L.

ACE Inhibitor 52

ACE Inhibitor Ischemia STEMI Physiology 52

Dr. Smith's ECG Blog

OCTOBER 19, 2022

(Ken Grauer points out that this 5th beat appears to be due to an early atrial beat and that these early beats continue for a few beats, suggesting a short run of atrial tachycardia.) The 6th beat (the one with the 5th visible pacer spike) has a pacing spike in the midst of the QRS. The pacemaker is not always "right".

Pacemaker 52

Pacemaker Physiology ICU Blog 52

EMS 12-Lead

MARCH 19, 2023

The shortened PR-interval, specifically, proved to be quite beguiling as it swept crews down a differential diagnosis of intermittent accessory pathway syndrome – insomuch as a “syndrome” of recurrent tachycardia to account for the patient’s symptoms. Conversely, some patient’s simply have brisk AVN conduction, which is completely benign.

Myocardial Infarction 52

Myocardial Infarction STEMI Coronary Angiogram Coronary Artery Disease 52

Dr. Smith's ECG Blog

JULY 21, 2019

I learned more about the history: 30-something African American with 5-7days of sharp R-sided shoulder/scapula/chest discomfort, presented with sinus tachycardia. Definitive diagnosis is by MRI. This history of a week of constant chest pain is also much more suggestive of myocarditis. OMI it is very unlikely with a week of constant pain.

Chest Pain 52

Chest Pain Myocardial Infarction Pericarditis Angina 52

Dr. Smith's ECG Blog

JULY 12, 2020

One looks for sinus tachycardia and diffuse low voltage but many conditions produce these nonspecific findings. Physiologically the ECG finding of electrical alternans correlates with the presence of a swinging heart within the pericardial sac on Echo.

Pericarditis 40

Pericarditis Hospital Ultrasound Blood Pressure 40

Dr. Smith's ECG Blog

NOVEMBER 19, 2016

Any alteration in physiology can change "compensated" AS to "decompensated" AS. Inotropes and Vasopressors: Review of Physiology and Clinical Use in Cardiovascular Medicine. Hypotension may of course be a result of a brady- or tachydysrhythmia. 2) Hypoxia, including poisons of oxidative phosphorylation such as HS, CO, CN. Circulation.

Ischemia 40

Ischemia Cardiogenic Shock Aortic Stenosis 40

Dr. Smith's ECG Blog

OCTOBER 7, 2019

Although the shock is no doubt partly a result of poor pump function, with low stroke volume, especially of the RV, it should be compensated for by tachycardia. Cardiac output is stroke volume x rate, so this patient needs a higher heart rate. This is a perfect indication for atropine.

Bradycardia 40

Bradycardia STEMI Cardiogenic Shock Ischemia 40

Circulation

NOVEMBER 11, 2024

Introduction:Postural orthostatic tachycardia syndrome (POTS) is a chronic syndrome with symptoms of orthostatic intolerance, tachycardia, and exercise intolerance. Circulation, Volume 150, Issue Suppl_1 , Page A4140020-A4140020, November 12, 2024.

Exercise 40

Exercise POTS Tachycardia Physiology 40

Dr. Smith's ECG Blog

JULY 19, 2024

Did YOU Notice that the underlying rhythm in Figure-1 appears to be atrial tachycardia? For physiologic reasons, recent years have seen a tendency to favor RV pacing from a higher site in the right ventricle. NOTE #2: I always like to look for the presence of an underlying rhythm in pacemaker tracings.

Chest Pain 115

Chest Pain Myocardial Infarction Pacemaker STEMI 115

Dr. Smith's ECG Blog

APRIL 8, 2015

If the patient has Abnormal Vital Signs (fever, hypotension, tachycardia, or tachypnea, or hypoxemia), then these are the primary issue to address, as there is ongoing pathology which must be identified. Fourth, syncope in the elderly often results from polypharmacy and abnormal physiologic responses to daily events.

Arrhythmia 52

Arrhythmia Outcomes Risk Factors Chest Pain 52

Dr. Smith's ECG Blog

DECEMBER 20, 2024

Conduction system pacing" is a newer technique that is being studied as a way of delivering more physiologic pacing, typically by inserting a lead into the area of the left bundle branch, or the bundle of His. Additionally, the patient had no other apparent reason to have sinus tachycardia (such as volume depletion, bleeding, fever).

Chest Pain 102

Chest Pain Tachycardia Pacemaker Defibrillator 102

Dr. S. Venkatesan MD

JANUARY 28, 2025

It doesn’t require any extraordinary intelligence to conclude any chronic focal atrial tachycardia can get degenerated to AF in the long run. In that case, the famous atrial tachycardia localizing map from Peter Kistler et al from Australia JACC 2006 holds good for location AF focus too.

Atrial Fibrillation 52

Atrial Fibrillation Pulmonary Tachycardia Electrophysiology 52

Dr. S. Venkatesan MD

DECEMBER 23, 2024

It needs a good knowledge of anatomy, physiology of inter & Intra valvular hemodynamics.It It needs a good knowledge of anatomy, physiology of inter & Intra valvular hemodynamics.It Mind you, even an innocuous episode of fever, associated dyspnea, and tachycardia can elevate the mitral gradient and sound a false alarm.

Bicuspid/Mitral 52

Bicuspid/Mitral Aortic valve Aortic Anatomy 52

Dr. Smith's ECG Blog

NOVEMBER 3, 2024

The CASE Continues: The patient had many episodes of NSVT ( Non-Sustained Ventricular Tachycardia ) — like th e one shown below in Figure-6. Learning points : Dual AV physiology in the retrograde direction does not necessarily mean there is dual AV conduction in the antegrade direction. Can YOU identify atrial activity in Figure-6 ?

Electrophysiology 65

Electrophysiology Pacemaker Physiology Tachycardia 65

Dr. Smith's ECG Blog

JANUARY 28, 2025

The physiologic reason for this finding is that the T wave axis in the limb leads generally follows the QRS axis. Removal of any doubt that these inferior lead ST-T wave changes are significant is forthcoming from the abnormal ST segment coving and surprisingly deep T wave inversion in lead aVL ( = reciprocal ST-T wave change ).

Chest Pain 105

Chest Pain STEMI Hospital Blood Pressure 105

Dr. Smith's ECG Blog

MARCH 8, 2025

Given the immediate physiologic chain reaction of intense autonomic dysfunction that followed on learning of her husband's death ( and which ultimately led to this patients demise ) I have to wonder WHEN ( and How? ) With regard to the Physiologic Chain Reaction As per Dr. Frick We do not have all the answers.

Cardiomyopathy 75

Cardiomyopathy Myocardial Infarction Defibrillator Bradycardia 75