The success of cardiac resynchronization therapy (CRT) depends on a high percentage of ventricular pacing. We present the electrocardiography and electrograms of a patient who underwent an implantable cardioverter-defibrillator (ICD) with CRT implantation showing a low percentage of ventricular pacing as a result of T wave oversensing of paced QRS. The patient showed no clinical improvement. We...

Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a disease where therapy with an internal cardioverter defibrillator (ICD) is frequently indicated, but the use of these devices is often challenged because of sensing dysfunction with low right ventricular sensing amplitude. We present the case of an ARVC patient in whom ICD sensing difficulties were overcome by the implantation of a cor...

Introduction The implantable cardioverter-defibrillator (ICD) has reduced mortality in survivors of sudden cardiac arrest and patients at high risk of sudden cardiac death. This benefit comes at the cost of device-related complications, including those related to transvenous leads. The subcutaneous ICD (S-ICD) is an alternative to the conventional transvenous ICD (TV-ICD) system and has no tran...

Despite the impressive development of medical therapies for patients with myocardial dysfunction, sudden cardiac death (SCD) is still too frequent. In patients with severe cardiomyopathies the insertion of an implantable cardiac defibrillator (ICD) has been shown to reduce SCD risk (1). For primary prevention in patients with left ventricular ejection fraction (LVEF) below 35%, ICD is now recom...

OBJECTIVE Implantable cardioverter-defibrillator has become the first-line therapy for prevention of sudden cardiac death. Controversial results still exist regarding the effectiveness of implantable cardioverter-defibrillator (ICD) in non-ischemic heart failure. METHODS The PubMed, Embase, and Cochrane Central databases were searched for randomized trials comparing implantable cardioverter-d...

Brugada syndrome (BrS) is a rare inheritable disorder identified by characteristic abnormalities in the anterior electrocardiographic (ECG) leads (1). The main clinical problem is sudden cardiac death (SCD). The only accepted form of SCD prevention is an implantable cardioverter defibrillator (ICD). However, the patient who undergoes ICD implantation is exposed to pain, inconvenience, and a wid...

All procedures have inherent risk. Our patient endured a sequence of rare life-threatening complications from commonly preformed procedures. The sequence of these complications was; large pericardial effusion post implantable cardioverter-defibrillator (ICD) implantation with echocardiographic signs of tamponade, left main narrowing post radiofrequency ablation, and late stent thrombosis post c...

T-wave oversensing can cause inappropriate implantable cardioverter-defibrillator (ICD) therapies that are difficult to correct. Remote monitoring allows follow-up of ICD patients without visiting the hospital and can help in early detection of any malfunctions. We describe the case of a patient who experienced inappropriate antitachycardia pacing therapy due to T-wave oversensing; the problem ...

Two cases are reported (both men, one 72 and one 54 years old) of inappropriate shocks delivered by an implantable cardiac defibrillator (ICD) device, which oversensed the myopotentials induced by deep breathing and Valsalva manoeuvre. No damage to leads was associated with the oversensing of myopotentials. The mechanism of the inappropriate shocks was determined using real time electrograms. M...

Clinical trials have established the superiority of the implantable cardioverter-defibrillator (ICD) over antiarrhythmic drug therapy in survivors of sudden cardiac death and in high-risk patients with coronary artery disease. The ICD has evolved to overcome the limitation of earlier devices that required thoracotomy for implantation and were fraught with inappropriate shock delivery. Current I...