Differentiating Causes of Dementia
Globally, approximately 50 million people have dementia, and there are nearly 10 million new cases every year. Dementia is a syndrome in which there is deterioration in memory, thinking, behaviour and the ability to perform everyday activities. Although dementia...
Understanding the Ventilation-Perfusion Relationship
To ensure that enough oxygen is provided by ventilation to saturate the blood fully requires that ventilation and perfusion of the lungs are adequately matched. Ventilation (V) refers to the flow of air into and out of the alveoli, while perfusion (Q) refers to the...
Understanding Acute Coronary Syndromes
The term ‘acute coronary syndromes’ describes a group of clinical conditions, all of which usually present with chest pain as a consequence of myocardial ischaemia or infarction. The acute coronary syndromes comprise: Unstable angina Non-ST elevation myocardial...
Hepatitis B Serology and Vaccination
Hepatitis B is an infection of the liver caused by the hepatitis B virus (HBV), a double-stranded DNA virus of the Hepadnaviridae family that replicates by reverse transcription. Hepatitis B is the most common cause of hepatitis globally, and the World Health...
