Percutaneous Inferior Cervical Sympathetic Block for Trea... | NCT04770051

NCT04770051

Protocol Section

Identification Module

Results Section

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No data is available for this block.

Annotation Section

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Document Section

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Derived Section

Miscellaneous Info Module

Status Module

Design Module

Interventional Study Design

Biospecimen

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No data is available for this block.

Arms/Interventions Module

Arm Groups

Label	Type	Description	Intervention Names
Percutaneous inferior cervical sympathetic block	Experimental	The procedure will be performed while the patient was awake and under fluoroscopic guidance. A total of 3 ml of 1% lidocaine will be infiltrated to anesthetize the skin and subcutaneous tissues down to the left common carotid artery. A 22 gauge × 3.5 inch BD™ Quincke spinal needle will be introduced at the level of the body of the sixth cervical vertebra, medial to the left common carotid artery. The needle will be advanced until it reached the junction between the body and transverse process of the sixth cervical vertebra. Contrast injection will be used to demonstrate the position of the needle anterior to the paravertebral muscles, with spread along the axis of the interfascial compartment (Figure 1). A total of 20 ml of 0.25% bupivacaine (Marcaine, Hospira, Lake Forest, IL) will be injected over 10 min through the needle. The effectiveness of sympathetic blockade will be confirmed by postprocedure development of ptosis and miosis in the left eye.	Procedure: Percutaneous inferior cervical sympathetic block

Interventions

Name	Type	Description	Arm Group Labels	Other Names
Percutaneous inferior cervical sympathetic block	Procedure	The procedure will be performed while the patient was awake and under fluoroscopic guidance. A total of 3 ml of 1% lidocaine will be infiltrated to anesthetize the skin and subcutaneous tissues down to the left common carotid artery. A 22 gauge × 3.5 inch BD™ Quincke spinal needle will be introduced at the level of the body of the sixth cervical vertebra, medial to the left common carotid artery. The needle will be advanced until it reached the junction between the body and transverse process of the sixth cervical vertebra. Contrast injection will be used to demonstrate the position of the needle anterior to the paravertebral muscles, with spread along the axis of the interfascial compartment (Figure 1). A total of 20 ml of 0.25% bupivacaine (Marcaine, Hospira, Lake Forest, IL) will be injected over 10 min through the needle. The effectiveness of sympathetic blockade will be confirmed by postprocedure development of ptosis and miosis in the left eye.

Measure	Description	Time Frame
Freedom from implantable cardioverter-defibrillator shock	Zero number of required cardioverter-defibrillator shocks in the patient's medical records	3 months

Eligibility Module

Eligibility Criteria

Inclusion Criteria:

Appropriate ICD shock for ventricular tachycardia (VT) after at least one catheter ablation of VT procedure, OR appropriate ICD shock for VT but not a candidate for catheter ablation of VT (i.e. patients with presence polymorphic VT or ventricular fibrillation, LV thrombus, VT arising from an inaccessible myocardial location).
Presence of structural heart disease as defined as EF ≤ 50%, presence of ventricular scar as detected by imaging modalities or electroanatomic mapping, hypertrophic cardiomyopathy, cardiac sarcoidosis, or arrhythmogenic right ventricular cardiomyopathy.
Patient is taking at least one anti-arrhythmic drug or has documented intolerance or toxicity to at least one anti-arrhythmic drug.
Age greater than 18 years old.
Able and willing to comply with all pre- and follow-up testing and requirements.
Provision of signed informed consent and stated willingness to comply with all study procedures for duration of the study.

Exclusion Criteria:

Active ongoing cardiac ischemia as assessed by: EKG, cardiac enzymes, symptoms, coronary angiography with evidence of significant epicardial coronary stenosis (>70%), or stress testing. (Note: positive troponin assay due to ICD shocks is not an exclusion criterion).
Any medical or non-medical condition likely to prevent completion of trial.
Contraindication to cardiac sympathetic denervation (i.e. single-lung ventilation, severe pulmonary disease, or severe pulmonary hypertension) or previous cardiac sympathetic denervation procedure.
Left ventricular assist device or status post orthotopic heart transplantation
Severe thrombocytopenia (platelets < 50,000) or coagulopathy (INR > 2.0) that is not due to medications or a reversible cause.
Women who are pregnant (as evidenced by pregnancy test if pre-menopausal).
Unable or unwilling to comply with protocol requirements.
NYHA class IV heart failure symptoms.
Known channelopathy such as long QT syndrome and catecholaminergic polymorphic VT.
Presentation with slow VT (VT rate < 150 bpm).