A 78-year-old female is admitted with a history of fever,
anorexia, malaise and weight loss. She looks thin, has a tachycardia and a
soft systolic murmur at the apex. No other abnormalities are detectable.
Investigations reveal a polymorphonuclear leucocytosis, an elevated ESR and a
high serum alkaline phosphatase. Blood cultures show growth of
In this patient the definitive investigation would be:
Abdominal ultrasound scan