A 38 year old man with an atrial septal defect complains of chest pain. On auscultation you hear a loud and split second heart sound in the second intercostal space, left parasternal region.
Closure of which structure is most likely responsible for this finding?

A 45 year old man has been in a motorbike crash A CT scan shows a fracture dislocation at T4 The sensory level is most likely to be found at which surface landmark?

A 30 year old woman attends the ED with a worsening headache and tight periorbital pain over the last (ew hours You suspect cavernous sinus thrombosis Her right eye has ptosis, mydriasis and is deviated laterally and downward Which nerve is most likely to be affected?

A three year old girl is diagnosed with measles in the ED and is well enough to be discharged Her dad wants to know when she can return to nursery.
What is the recommended absence period?

A newborn infant is brought to your ED He was born at 39 weeks gestation with low birthweight, a purpuric rash, hepatosplenomegaly and bilateral cataracts You suspect the signs are secondary to an infection acquired while khe baby was still in utero Which organism is most likely to cause this clinical presentation?