Bioprostheses of the aortic valve
A. eventually develop the same disease as the native valve.
B. last longer in younger than older patients.
C. do not require prophylaxis against endocarditis.
D. do not require long-term anticoagulation.
E. . are haemodynamically superior to mechanical prostheses
With respect to automatic irnplantable defibrillators:
implanting a defibrillator with epicardial patches carries a mortality rate of about 2%.
pace-termination functions are available in these devices.
the incidence of sudden arrhythmia death after successful defibrillator implantation is about 1% per annum
defibrillator shocks are dangerous for those in contact with the patient at the time.
implantation is not indicated in severe cardiac failure.
Which of the following statements is/are true of percutaneous transluminal coronary angioplasty?
A. The primary success rate of the procedure is more than 70%.
B. Re-stenosis, if it occurs, is within 6 months of the procedure.
C. Long-term anticoagulant therapy reduces the frequency of re-stenosis.
D. The mortality rate as an elective procedure is about 2%.
E. Long-term antiplatelet therapy reduces the frequency of re- stenosis.
Concerning the prognosis of myocardial infarction:
hospital mortality is unrelated to age.
late sudden death in survivers of ventricular fibrillation is more likely if acute myocardial infarction evolves than if no evidence for acute infarction is found
survival up to one year after infarction is mainly dependent on the number of diseased coronary arteries.
D. poor left ventricular function is associated with an increased likelihood of later ventricular tachycardia.
E. electrophysiological study identifies patients prone to die suddenly in the next year.
A young male following trauma develops ARDS. He is intubated and ventilated but now breathing spontaneously. He has a central line with TPN and a Swan Ganz catheter in situ - both for 10 days. He is on Ceftriaxone for persisting bilateral pulmonary infiltrates and blood cultures to date have been negative. He becomes very unwell and septic, T 40, BP 70/50. His blood and urine are sent for culture and his CXR is unchanged. After the initial resuscitation you should
change all lines and send for culture
culture endotracheal secretions
bronchoscopy +/- TBB
broad spectrum antibiotics
Haemodynamic response to SVT can be predicted by
relationship between P waves and QRS complexes
variability in the P wave morphology
Concerning drug metabolism in congestive cardiac failure
decreased gastric absorption
decreased oral bioavailability of drugs with “low” hepatic extraction
decreased clearance of drugs with “high” hepatic extraction
decreased distribution of intravenously administered drugs
Which of the following are consistent with Constrictive Pericarditis
unimpeded early diastolic ventricular filling