It's a long way to the top! Congenital venous anomalies and left isomerism limiting atrial fibrillation transcatheter ablation

BACKGROUND

Atrial fibrillation is the most common sustained cardiac arrhythmia in adults and it is associated with a high burden of mortality and morbidity worldwide. Catheter ablation is increasingly used to improve symptoms and prognosis in selected patients. Lower limb venous access with subsequent transseptal approach to the left atrium is the standard procedure for atrial fibrillation catheter ablation.

CASE PRESENTATION

We report an unusual case of complex venous anomaly with a left-sided inferior vena cava with hemiazygos continuation to a persistent left superior vena cava draining in an enlarged coronary sinus in a patient with persistent atrial fibrillation scheduled for transcatheter ablation.

DISCUSSION

Lower limb venous anomalies may limit a standard transseptal approach to the left atrium thus precluding an effective catheter ablation procedure for atrial fibrillation. Alternative interventions, such as unconventional percutaneous access, thoracoscopic approach and "ablate and pace" procedures, may be necessary in patients with symptomatic atrial fibrillation and complex venous anomalies.

Multivessel coronary spasm triggered by ganglionated plexi stimulation during atrial fibrillation radiofrequency catheter ablation: a case report

Background

Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia in adults, and it is associated with a high burden of mortality and morbidity worldwide. AF can be managed with rate-control or rhythm-control strategies. The latter is increasingly used to improve symptoms and prognosis in selected patients, especially after the development of catheter ablation. Although this technique is generally considered safe, it is not free from rare but life-threatening procedure-related adverse events. Among these, coronary artery spasm (CAS) is an uncommon but potentially fatal complication that requires immediate diagnosis and treatment.

Case summary

We report a case of severe multivessel CAS triggered by ganglionated plexi stimulation during pulmonary vein isolation with radiofrequency catheter ablation in a patient with persistent AF, promptly resolved after intracoronary nitrate administration.

Discussion

Although rare, CAS is a serious complication of AF catheter ablation. Immediate invasive coronary angiography is key for both diagnosis confirmation and treatment of such dangerous condition. As the number of invasive procedures increases, it is important that both interventional and general cardiologists are aware of possible procedure-related adverse events.

Case report: An unusual case of phrenic nerve stimulation in a patient with single chamber implantable cardioverter defibrillator

Background

Phrenic nerve stimulation is a well-recognized complication related to cardiac implantable electronic devices, in particular with left ventricular coronary sinus pacing leads for cardiac resynchronization therapy.

Case presentation

We report an unusual case of symptomatic phrenic nerve stimulation due to inadvertent placement of a right ventricular defibrillation lead in coronary sinus posterior branch in a patient with heart failure with reduced ejection fraction with a recently implanted single-chamber cardioverter defibrillator.

Discussion

Phrenic nerve stimulation is a relatively common complication of left ventricular pacing. Inadvertent placement of a right ventricular lead in a coronary sinus branch is a rare but possible cause of phrenic nerve stimulation. Careful evaluation of intraprocedural fluoroscopic and electrocardiographic appearance of pacing and defibrillation leads during implantation may prevent inadvertent placement of a right ventricular lead in the coronary sinus.

1094 MULTIVESSEL CORONARY ARTERY SPASM TRIGGERED BY GANGLIONATED PLEXI STIMULATION DURING ATRIAL FIBRILLATION RADIOFREQUENCY CATHETER ABLATYION: A CASE REPORT

Background

Atrial fibrillation is the most common sustained cardiac arrhythmia in adults and it is associated with a high burden of mortality and morbidity worldwide. Atrial fibrillation could be managed with rate-control or rhythm-control strategies. The latter is increasingly used to improve symptoms and prognosis in selected patients, especially after the development of catheter ablation. Although this technique is generally considered safe, it is not free from rare but life-threatening procedure-related adverse events. Among these, coronary artery spasm is an uncommon but potentially fatal complication that requires immediate diagnosis and treatment.

Case summary

We report a case of severe multivessel coronary artery spasm triggered by ganglionated plexi stimulation during pulmonary vein isolation with radiofrequency catheter ablation in a patient with persistent atrial fibrillation, promptly resolved after intracoronary nitrate administration.

Discussion

Although rare, coronary artery spasm is a serious complication of atrial fibrillation catheter ablation. Immediate invasive coronary angiography is key for both diagnosis confirmation and treatment of such dangerous condition. As the number of invasive procedures increases, it is important that both interventional and general cardiologists are aware of possible procedure-related adverse events.

1101 AN UNUSUAL CASE OF PHRENIC NERVE STIMULATION IN A PATIENT WITH SINGLE CHAMBER IMPLANTABLE CARDIOVERTER DEFIBRILLATOR

Background

Phrenic nerve stimulation is a well-recognized complication related to cardiac implantable electronic devices, in particular with left ventricular coronary sinus pacing leads for cardiac resynchronization therapy.

Case presentation

We report an unusual case of symptomatic phrenic nerve stimulation due to inadvertent placement of a right ventricular defibrillation lead in coronary sinus posterior branch in a patient with heart failure with reduced ejection fraction with a recently implanted single-chamber cardioverter defibrillator.

Discussion

Phrenic nerve stimulation is a relatively common complication of left ventricular pacing. Inadvertent placement of a right ventricular lead in a coronary sinus branch is a rare but possible cause of phrenic nerve stimulation. Careful evaluation of intraprocedural fluoroscopic and electrocardiographic appearance of pacing and defibrillation leads during implantation may prevent inadvertent placement of a right ventricular lead in the coronary sinus.

Combined Treatment With Carotid Endoarterectomy and Coronary Artery Bypass Grafting: A Single-Institutional Experience in 222 Patients

INTRODUCTION

Carotid atherosclerotic disease is a known independent risk factor of post operative stroke after coronary artery bypass grafting (CABG). The best management of concomitant coronary artery disease and carotid artery disease remains debated. Current strategies include simultaneous carotid endoarterectomy (CEA) and CABG, staged CEA followed by CABG, staged CABG followed by CEA, staged transfemoral carotid artery stenting (TF-CAS) followed by CABG, simultaneous TF-CAS and CABG and transcarotid artery stenting.

METHODS

We report our experience based on a cohort of 222 patients undergoing combined CEA and CABG surgery who come to our observation from 2004 to 2020. All patients with >70% carotid stenosis and severe multivessel or common truncal coronary artery disease underwent combined CEA and CABG surgery at our instituion. 30% of patients had previously remote neurological symptoms or a cerebral CT-scan with ischemic lesions. Patients with carotid stenosis >70%, either asymptomatic or symptomatic, underwent CT-scan without contrast media to assess ischemic brain injury, and in some cases, if necessary, CT-angiography of the neck and intracranial vessels.

RESULTS

The overall perioperative mortality rate was 4.1% (9/222 patients). Two patients (.9%) had periprocedural ipsilateral transient ischemic attack (TIA) which completely resolved by the second postoperative day. Two patients (.9%) had an ipsilateral stroke, while 7 patients (3.2%) had a stroke of the controlateral brain hemisphere. Two patients (.9%) patients were affected by periprocedural coma caused by cerebral hypoperfusion due to perioperative heart failure. There were no statistically significant differences between patients in Extracorporeal Circulation (ECC) and Off-pump patients in the onset of perioperative stroke.

CONCLUSION

Our experience reported that combined surgical treatment of CEA and CABG, possibly Off-Pump, is a feasible treatment procedure, able to minimize the risk of post-operative stroke and cognitive deficits.