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Arrhythmia Defibrillator Tachycardia 
Dr. Smith's ECG Blog
SEPTEMBER 27, 2023
ECG#1 There is a regular tachycardia with a ventricular rate of about 180 bpm. Smith comment : When there is a regular wide complex tachycardia, first assess whether it is sinus or not. Put shortly is SVT with "Shark Fin STE" and not ventricular tachycardia. An ECG was recorded immediately and is shown below. Is there OMI?
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DAIC
JUNE 19, 2024
Cingolani, director of Cardiogenetics and Preclinical Research in the Department of Cardiology in the Smidt Heart Institute at Cedars-Sinai, is exploring new ways to help patients with ventricular tachycardia (VT), a recurring, abnormally fast and irregular heartbeat that starts in the lower chambers, or ventricles, of the heart.
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All About Cardiovascular System and Disorders
APRIL 17, 2024
Ventricular tachycardia is a potentially life threatening cardiac arrhythmia. On the ECG, ventricular tachycardia can be defined as three or more ventricular ectopic beats occurring in a sequence at a rate more than 100 per minute. Another rare form of ventricular tachycardia is bidirectional ventricular tachycardia.
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Dr. Smith's ECG Blog
JULY 25, 2024
He was defibrillated into VT. He then underwent dual sequential defibrillation into asystole. See these related cases: Cardiac arrest, defibrillated, diffuse ST depression and ST Elevation in aVR. Description of today's ECG findings ( Sinus tachycardia with diffuse ST depression and ST elevation in aVR ) — is diagnostic of DSI.
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Medical Xpress - Cardiology
APRIL 10, 2024
The late-breaking science was presented at EHRA 2024, a scientific congress of the European Society of Cardiology (ESC).
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All About Cardiovascular System and Disorders
MARCH 17, 2024
Here is the transcript of the video: Implantable defibrillator is an important life saving device. It can automatically detect life threatening ventricular arrhythmias and treat them, either with a shock or, sometimes by overdrive pacing. These are high voltage, defibrillator shock coils. So, this is how an ICD works.
Ken Grauer, MD
JUNE 27, 2024
What is the most likely cause of this arrhythmia? IMPRESSION: Given the presence of a wide tachycardia — with 2 distinct QRS morphologies, and no sign of P waves — a presumed diagnosis of B i D irectional Ventricular Tachycardia has to be made. He developed cardiac arrest shortly after the ECG in Figure-1 was recorded.
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Dr. Smith's ECG Blog
JANUARY 23, 2024
Shortly after isoprenalin infusion was initiated, there were short runs of ventricular tachycardia. She was given CRT-D (Cardiac Resynchronization Therapy-Defibrillator). VT is the second most common presenting arrhythmia. Vaso or inotropic medications are not harmless, and can precipitate life threatening arrhythmias.
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Dr. Smith's ECG Blog
JULY 21, 2024
However, he suddenly developed a series of malignant ventricular arrhythmias. This progressed to electrical storm , with incessant PolyMorphic Ventricular Tachycardia ( PMVT ) and recurrent episodes of Ventricular Fibrillation ( VFib ). He required multiple defibrillations within a period of a few hours. What do you think?
134 
DAIC
SEPTEMBER 5, 2024
2, 2024 – Medtronic recently shared long-term results from the global Extravascular Implantable Cardioverter Defibrillator (EV ICD) Pivotal Trial, reinforcing the performance and safety of the EV-ICD system. It works by briefly delivering pacing pulses to the heart at a rate faster than the tachycardia.
HeartRhythm
APRIL 30, 2024
For the past four decades, implantable cardioverter defibrillator (ICD) therapy has become the standard of care for preventing sudden cardiac death in high-risk individuals. The rate of ICD implantation has risen due to the increasing population age and the growing prevalence of cardiac arrhythmias.
HeartRhythm
APRIL 30, 2024
Non-sustained ventricular tachycardia (NSVT) is a predictor of sustained ventricular arrhythmias (VA) among implantable cardioverter defibrillator (ICD) recipients. We hypothesized that that a history of NSVT in primary prevention ICD recipients may parallel the risk profile observed in secondary prevention ICD recipients.
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HeartRhythm
APRIL 30, 2024
Patients with therapy-refractory ventricular tachycardia (VT) suffer from recurrent VT episodes despite optimal conventional therapy. Consequent implantable cardioverter-defibrillator (ICD) shocks can tremendously affect quality of life.
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HeartRhythm
JUNE 3, 2024
Recent advancements in catheter ablation for structural ventricular tachycardia (VT), such as high-density mapping and cardiac imaging-based detection of target areas, have significantly improved the efficacy of ablation procedures. These developments are likely to broaden the treatment scope to include patients with recurrent VT episodes.
Journal of the American Heart Association
FEBRUARY 13, 2024
BackgroundScreening for atrial fibrillation (AF) may reveal incidental arrhythmias of relevance. We furthermore report treatment decisions because of incidental arrhythmias. We furthermore report treatment decisions because of incidental arrhythmias. We found incidental arrhythmias in 94 patients (11.8%).
Dr. Smith's ECG Blog
OCTOBER 23, 2023
She was successfully revived after several rounds of ACLS including defibrillation and amiodarone. An Initial ECG was performed: Initial ECG: Sinus tachycardia with prolonged QT interval (QTc of 534 ms by Bazett). T-wave alternans and the susceptibility to ventricular arrhythmias. No ischemic ST changes. Teaching Points: 1.
134 
Journal of Cardiovascular Electrophysiology
FEBRUARY 7, 2024
Progressive decline across periods in mortality rates among patients with implantable cardioverter-defibrillator (ICD). Chagas disease (ChD) was associated with increased rates of ventricular tachycardia and ventricular fibrillation in ICD patients only in the initial two periods, but there was no statistical difference in the last period.
HeartRhythm
MARCH 12, 2024
Many patients with mild to moderately reduced left ventricular ejection fraction (LVEF) that require permanent pacemaker (PPM) implantation do not have a concurrent indication for implantable cardioverter-defibrillator (ICD) therapy. However, the risk of ventricular tachycardia/fibrillation (VT/VF) in this population is unknown.
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HeartRhythm
APRIL 30, 2024
In the PARTITA trial antitachycardia pacing (ATP) predicted the occurrence of implantable cardioverter-defibrillator (ICD) shocks. Catheter ablation of ventricular tachycardia after the first shock reduced the risk of death or worsening heart failure (wHF).
Circulation
NOVEMBER 11, 2024
This can initiate ventricular arrhythmias like polymorphic ventricular tachycardia (PMVT). She was externally defibrillated with 200J and received magnesium and an IV amiodarone bolus. She was successfully defibrillated with 360J. Telemetry showed Spike-on-T phenomenon which initiated PMVT.
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HeartRhythm
OCTOBER 15, 2023
Sudden cardiac death remains the main killer of adults in industrialized countries and reentrant ventricular arrhythmia (VA) is its main underlying mechanism1.
European Journal of Heart Failure
NOVEMBER 11, 2024
The main secondary study endpoints are all-cause mortality, cardiovascular mortality, incidence of implantable cardioverter-defibrillator (ICD) therapy, hospitalizations, quality of life, time to first ICD therapy, number of device-detected ventricular tachycardia/ventricular fibrillation episodes, left ventricular function, and exercise tolerance.
Open Heart
NOVEMBER 21, 2024
Background Ventricular arrhythmias (VAs) frequently occur in the acute phase of myocarditis. An increased risk of adverse outcomes during follow-up was observed in patients presenting with monomorphic ventricular tachycardia (OR 3.77, 95% CI 1.23 The pooled proportion of patients who experienced VA recurrence was 0.41 (95% CI 0.30
Dr. Smith's ECG Blog
JANUARY 2, 2025
Because she has cardiomyopathy and ventricular dysrhythmias, the pacer included an Implanted Cardioverter-Defibrillator (ICD) Echo 6 days later after CRT: Normal estimated left ventricular ejection fraction. Even with tachycardia and a paced QRS duration of ~0.16 No wall motion abnormality. J Am Coll Cardiol.
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All About Cardiovascular System and Disorders
MAY 1, 2024
ICD is short form for implantable cardioverter defibrillator, used to automatically shock back the heart into action in case of life threatening ventricular arrhythmias. Moreover, the internal shocks given by CRT-D can be painful, though essential to save life in case of fast ventricular tachycardia or fibrillation.
Heart BMJ
JANUARY 10, 2024
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a disease characterised by fibrofatty replacement of the ventricular myocardium due to specific mutations, leading to ventricular arrhythmias and sudden cardiac death. channels, Connexin 43 and Wnt signalling, potentially modifying myocardial fibrosis.
Dr. Smith's ECG Blog
SEPTEMBER 16, 2024
After resuscitation and defibrillation , there were no more episodes of TdP. Below is the patient’s 12 lead ECG following defibrillation. Learning points : Takotsubo can lead to cardiac arrest from ventricular arrhythmia. But there are 3 other wide beats in the tachycardia that begins with beat #6 ( = beats #7; 13,14 ).
Dr. Smith's ECG Blog
OCTOBER 20, 2024
The arrhythmia spontaneously converted before defibrillation was achieved. Just prior to arrival he fell out of consciousness with the below ECG on the monitor. ECG #3 The above ECG shows a polymorphic VT at a rate of about 180 BPM.
Cardiometabolic Health Congress
AUGUST 30, 2024
Arrhythmias : A leadless pacemaker-defibrillator system provides antitachycardia pacing for ventricular tachycardia in patients with subcutaneous ICDs. Coronary Heart Disease : Initiate beta-blockers in patients with acute MI and normal LVEF unless contraindicated or if they have heart failure.
Wellnest
JUNE 19, 2023
Similarly, you may use our , app to adjust the paper speed along with amplification to read the slightest changes, especially for conditions like tachycardia and bradycardia. Alternatively, it also helps enhance arrhythmia management with coronary artery disease. It improves the prediction model for myocardial scar mass.
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Dr. Smith's ECG Blog
JANUARY 15, 2024
We can see enough to make out that the rhythm is sinus tachycardia. Tachycardia is unusual for OMI, unless the patient is in cardiogenic shock (or getting close). A bedside ultrasound should be done to assess volume and other etiologies of tachycardia, but if no cause of type 2 MI is found, the cath lab should be activated NOW.
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Ken Grauer, MD
MARCH 23, 2023
She underwent cardiopulmonary resuscitation for VT/VFib — with ROSC ( R eturn O f S pontaneous C irculation ) following defibrillation and treatment with Epinephrine and Amiodarone. A series of cardiac arrhythmias were seen during the course of her resuscitation — including the interesting arrhythmia shown in the long lead II of Figure-1.
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Dr. Smith's ECG Blog
SEPTEMBER 2, 2024
There are a number of things to look for in an ECG that can hint at arrhythmia as the cause of an apparent seizure. There is a run of polymorphic ventricular tachycardia — which given the QT prolongation, qualifies as Torsades de Points ( TdP ). This episode self terminated before defibrillation was possible.
116 
Frontiers in Cardiovascular Medicine
DECEMBER 12, 2024
BackgroundCatecholaminergic polymorphic ventricular tachycardia (CPVT) is a rare inherited arrhythmia disorder characterized by ventricular arrhythmia triggered by adrenergic stimulation.Case presentationA 9-year-old boy presented with convulsions following physical exertion. 720G>A (p.ArG2401His). Nadolol was initially started.
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Journal of the American Heart Association
MARCH 8, 2024
BackgroundCurrent guidelines recommend placing an implantable cardiac defibrillator for patients with cardiac sarcoidosis and a severely impaired left ventricular ejection fraction (LVEF) of ≤35%. Methods and ResultsWe retrospectively analyzed 401 patients with cardiac sarcoidosis without sustained ventricular arrhythmia at diagnosis.
Dr. Smith's ECG Blog
APRIL 29, 2020
She was never defibrillated. Therefore, she underwent temporary pacemaker placement and overdrive pacing at a rate of 90 bpm to keep the heart rate up in order to prevent these PVCs triggering ventricular arrhythmia. Hypokalemia was unlikely because she continued to have ventricular arrhythmia despite of correcting electrolytes.
Dr. Smith's ECG Blog
APRIL 8, 2016
At cath, he immediately had incessant Torsades de Pointes requiring defibrillation 7 times and requiring placement of a transvenous pacer for overdrive pacing at a rate of 80. See here for management of Polymorphic Ventricular Tachycardia , which includes Torsades. He was given amiodarone and lidocaine load and drip and K and Mg drips.
52 
Dr. Smith's ECG Blog
NOVEMBER 30, 2019
Is it ventricular tachycardia (VT) due to hyperK or is it a supraventricular rhythm with hyperK? Here are other posts on hyperK, large calcium doses for hyperK, and ventricular tachycardia in hyperK Weakness, prolonged PR interval, wide complex, ventricular tachycardia Very Wide and Very Fast, What is it? How would you treat?
European Journal of Heart Failure
NOVEMBER 14, 2023
The review first focuses on SCD incidence in cardiomyopathies and then summarizes established and emerging risk factors for life-threatening arrhythmias/SCD. Syncope, LGE on CMR, inducible sustained VT at PES, pathogenic mutations in LMNA, PLN, FLNC, and RBM20.
Dr. Smith's ECG Blog
JANUARY 30, 2019
Otherwise vitals after intubation were only notable for tachycardia. An initial EKG was obtained: Computer read: sinus tachycardia, early acute anterior infarct. Prior to Mizusawa's study, it was thought that the incidence of syncope, arrhythmia, or SCD in this cohort was low [7]. There was a 0.9% Circulation, 117, 1890–1893. [3]:
52 
Dr. Smith's ECG Blog
DECEMBER 5, 2019
There is sinus tachycardia and also a large R-wave in aVR. Drug toxicity , especially diphenhydramine , which has sodium channel blocking effects, and also anticholinergic effects which may result in sinus tachycardia, hyperthermia, delirium, and dry skin. Her temperature was 106 degrees. As part of the workup, she underwent an ECG.
Dr. Smith's ECG Blog
DECEMBER 20, 2024
This is the shock coil and identifies this device as a defibrillator. CRT-D is cardiac resynchronization therapy with defibrillation capability, like the CXR above. CRT-P is cardiac resynchronization therapy with pacing only, without the ability to defibrillate. So the most likely rhythm in ECG 1 is ectopic atrial tachycardia.
104 
Dr. Smith's ECG Blog
DECEMBER 31, 2024
Soon after the witnessed occlusion, the patient suffered ventricular fibrillation arrest, from which he was immediately resuscitated with 1 defibrillation. The note documents that the first view of the LCX showed 99%, TIMI 2 flow, but then (before intervention) was seen to fully occlude in real time (100%, TIMI 0).
122 
Dr. Smith's ECG Blog
DECEMBER 27, 2024
This is an arrhythmia until proven otherwise. This proves AV dissociation, and by extension ventricular tachycardia. The note lists a diagnosis of "tachycardia," which is described as "narrow complex." (The Repeat ECG obtained in ER: Fortunately for the patient, his ventricular tachycardia spontaneously resolved.
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