Dehydrated Alcohol

Dehydrated alcohol injection is indicated to induce controlled cardiac septal infarction to improve exercise capacity in adults with symptomatic hypertrophic obstructive cardiomyopathy who are not candidates for surgical myectomy. Dehydrated alcohol injection is an ablative agent indicated to induce controlled cardiac septal infarction to improve exercise capacity in adults with symptomatic hypertrophic obstructive cardiomyopathy who are not candidates for surgical myectomy. ( 1 )

Injection: 5 mL of ethyl alcohol ≥ 99% by volume as a clear, colorless liquid in a single-dose glass vial. Injection: 5 mL of ethyl alcohol ≥ 99% by volume as a clear, colorless liquid in a single-dose glass vial. ( 3 )

None. None ( 4 )

Transient heart block: Transient heart block is common at the time of injection. A temporary pacing wire is routinely inserted to mitigate transient heart block. ( 5.1 ) Persistent heart block: Approximately 10% of complete heart block events become permanent and require placement of a permanent pacemaker. ( 5.1 ) Remove the temporary pacemaker lead if no episode of high-degree atrioventricular block occurs. ( 5.1 ) Monitor the patient for heart failure, chest pain, and arrhythmias several days after the procedure. ( 5.1, 5.2, 5.3 )

5.1 Heart Block Transient Heart Block Transient heart block is common at the time of dehydrated alcohol, such as dehydrated alcohol injection into a septal artery. Prior to the injection, a temporary pacing wire is routinely inserted into the apex of the right ventricle, usually via the femoral vein, to treat transient heart block. The pacing lead can be removed if no episode of high-degree atrioventricular block occurs, usually after several hours of observation following percutaneous transluminal septal myocardial ablation. Persistent Heart Block Approximately 10% of complete heart block events become permanent and require placement of a permanent pacemaker following percutaneous transluminal septal myocardial ablation. Risk factors for permanent pacemaker dependency after septal ablation include a baseline PQ interval > 160 ms, baseline minimum heart rate < 50 bpm, baseline left ventricular outflow gradient > 70 mmHg, maximum QRS during the first 48 hours > 155 ms, 3 rd degree atrio-ventricular block occurring during the procedure, and no clinical recovery between 12-48 hours after the procedure.

5.2 Myocardial Infarction Injection of dehydrated alcohol is intended to create a controlled myocardial infarction for therapeutic purposes. However, excessive myocardial necrosis and subsequent heart failure have been reported. Factors increasing the risk of excessive tissue necrosis include higher volume of alcohol used and a higher number of septal branches injected to reduce the left ventricular outflow tract gradient.

5.3 Ventricular Arrhythmia Ventricular tachycardia and ventricular fibrillation requiring electrocardioversion occurred at a frequency of approximately 1%. Perform continuous electrocardiographic monitoring for 48 hours after the procedure.

Heart block [see Warnings and precautions (5.1) ] The following other adverse reactions associated with percutaneous transluminal septal myocardial ablation with the use of dehydrated alcohol, such as dehydrated alcohol injection, were identified in the literature: Ventricular tachycardia and ventricular fibrillation. Adverse reactions include arrhythmias, including ventricular tachycardia and/or ventricular fibrillation. ( 6 ) To report SUSPECTED ADVERSE REACTIONS, contact Ingenus Pharmaceuticals, LLC at 1-877-748-1970 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch .

Dehydrated alcohol injection is not recommended during pregnancy. Maternal use is not expected to result in fetal exposure to the drug. ( 8.1 ) The rate of heart blocks and dysrhythmia increased with age. ( 8.5 ) See 17 for PATIENT COUNSELING INFORMATION

8.1 Pregnancy Risk Summary The concentrations of alcohol in blood after PTSMA were not measured, but dehydrated alcohol injection, is not expected to increase significantly the systemic concentrations of endogenous alcohol following administration into a septal artery during percutaneous transluminal septal myocardial ablation. Maternal use is not expected to result in fetal exposure to the drug. Clinical Considerations Dehydrated alcohol injection for percutaneous transluminal septal myocardial ablation has not been evaluated in pregnant women and is not recommended during pregnancy. When possible, the percutaneous transluminal septal myocardial ablation procedure should be postponed in women until the postpartum period. Data Animal reproduction studies have shown an adverse effect on the fetus and chronic fetal alcohol exposure is known to cause developmental defects in human. The developmental effects of acute ethanol exposure, such as from percutaneous transluminal septal myocardial ablation, have not been studied in pregnant or lactating women.

8.2 Lactation Dehydrated alcohol injection is not expected to increase significantly the systemic concentrations of endogenous alcohol following administration into a septal artery during percutaneous transluminal septal myocardial ablation and breastfeeding is not expected to result in exposure of the child to the drug.

8.4 Pediatric Use Safety and effectiveness in pediatric patients have not been established.

8.5 Geriatric Use A comparison of the outcomes in patients with hypertrophic obstructive cardiomyopathy in patients < 60 years old and in patients ≥60 years old showed similar improvement in exercise capacity after ablation. The rate of heart blocks and dysrhythmia increased with age. Permanent pacemaker dependency increased to 34% in patients > 60 years old.

Dehydrated alcohol is a tissue toxin that produces a myocardial infarction when injected through an intra-arterial catheter into a target septal vessel, which causes the hypertrophied septum to thin.