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LETTERS TO EDITOR
Year : 2023 | Volume
: 24
| Issue : 1 | Page : 79-80
Rhythm disturbances and their management in a case of Ebstein's anomaly
Navneh Samagh1, Minnu M Panditrao2, Mridul Madhav Panditrao3, Nimish Singh1
1 Department of Anaesthesiology and Critical Care, All India Institute of Medical Sciences, Bathinda, Punjab, India
2 Department of Anaesthesiology, Adesh Institute of Medical Sciences and Research, Bathinda, Punjab, India
3 Department of Anaesthesiology, Bharati Vidyapeeth, Pune, Maharashtra, India
Correspondence Address:
Dr. Navneh Samagh
Department of Anaesthesiology and Critical Care, All India Institute of Medical Sciences, Bathinda, Punjab
India
Source of Support: None, Conflict of Interest: None
CheckDOI: 10.4103/TheIAForum.TheIAForum_82_22
How to cite this article:Sir,
A 34-year-old male with perforation peritonitis was posted for exploratory laparotomy. There was no history of any comorbidities. Electrocardiography showed the presence of Q waves in leads II, III, and aVF suggestive of old c. Two-dimensional echocardiography revealed Ebstein's anomaly of tricuspid valve with mildly thickened valves, displacement of septal leaflets, and long anterior tricuspid leaflet. The right atrium and ventricle were dilated with moderate TR and moderate PAH. There was no regional wall motion abnormality, with an ejection fraction of 60%. Written informed consent was taken. Infective endocarditis prophylaxis was given. Standard ASA monitors were applied. Preoperative vitals were normal. Rapid sequence induction was done using injection propofol and injection succinylcholine. Injection fentanyl 2 mcg/kg was given. The patient was maintained on O2: Air (50:50) mixture, fentanyl, isoflurane, and vecuronium. Central venous catheter insertion was avoided as it might provoke life-threatening arrhythmias and could precipitate bacterial endocarditis.[1]
Intraoperatively, the patient developed supraventricular tachycardia (SVT) with a fall in oxygen saturation to 76%. Blood pressure was 96/60 mm of Hg. Chest examination was normal. About 100% O2 was started. Carotid massage, eyeball compression, and Valsalva were given with no effect on heart rate. Injection amiodarone followed by metoprolol was given in titrated doses, but it could not substantially bring down the pulse rate. Injection adenosine 6 mg bolus was then given which reverted the SVT to normal sinus rhythm and rate. There was an improvement in saturation and an Air: Oxygen (50:50) mixture was restarted. The patient was extubated after 2 h in the postanesthesia care unit and discharged after 7 days.
Ebstein's anomaly is a complex Congenital heart disease (CHD), in which there is a downward displacement of the tricuspid valve resulting in the displacement of septal and posterior leaflets of the tricuspid valve below the true annulus into the right ventricle. The anterior leaflet is larger and malformed. This in turn results in the formation of an atrialized right ventricle between the true annulus and the attachment of leaflets. This atrialized ventricle has fewer cells as compared to the normal ventricle resulting in its thinning, dilatation, and increased propensity for tricuspid regurgitation.[2] Patients may develop pulmonary hypertension, intracardiac shunting, dysrhythmias, Wolff- Parkinson- White (WPW) syndrome, infective endocarditis, congestive cardiac failure, and systemic and pulmonary embolization.[3]
Anesthetic management in these patients depends on clinical manifestations. Our patient had no history or clinical findings suggestive of cardiac disease. The presence of symptoms signifies altered hemodynamics and increases the likelihood of arrhythmias.[4] Hence, induction of anesthesia was done with fentanyl and incremental doses of propofol. Induction with ketamine is recommended in unstable patients with severe illness.[4] Tachycardia must be prevented as it is known to impair the filling of functionally small volume right ventricle.
The incidence of SVT in these patients has been found to be as high as 20%.[5] Our patient developed SVT intraoperatively. The tachycardia resulted in worsening of the right to left shunt which resulted in a fall in saturation. The resultant hypoxia causes pulmonary vasoconstriction which further worsens the right to left shunt. The vagal maneuvers such as carotid massage, eyeball compression, and Valsalva have been reported to abort SVT in 80% of patients.[6] If not effective then adenosine (6–12 mg intravenous [IV]) or verapamil (2.5–10 mg IV) are the agents of choice. Beta-blockers are second-line agents to terminate tachycardia.[6]
Thus, successful management of patients requires thorough knowledge of anatomical and physiological derangements and meticulous planning for the management of complications.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form, the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Nil.
Conflicts of interest
There are no conflicts of interest.
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