63 year old patient with history of tachy-arrythmias is on implantable cardioveer defibrillator. The patient develops shock suddenly. Which of the following is best investigation to know position and integrity of ICD?: (A) Plain radiograph, (B) MRI, (C) USG, (D) Contrast CT
Answer is A. Contrast CT is IOC in ICD as MRI is C/I in implantable cardioveer defibrillator. Absolute C/I of MRI Cardiac pacemakers Metallic prosthetic hea valves Cochlear implant Aneurysmal clip Ocular metallic foreign body (IOC is CT) But the patient developed shock, so immediate investigation could be a plain radiograph rather than CECT Scan.