This site is a small reference desk for the words and numbers that come up around heart and stroke health. It exists because most people first meet this vocabulary at a stressful moment — a lab report full of unfamiliar units, a chart with two blood pressure numbers, a news story that uses heart attack and cardiac arrest interchangeably when they are different things.
The pages here explain terminology and measurement, not treatment. You can read what the two blood pressure numbers mean, why US and international cholesterol reports use different units, how heart attack, cardiac arrest, and stroke differ as terms, and what the specifications on a home blood pressure monitor actually mean.
The most practical thing on the site is the cholesterol unit converter, which translates between mg/dL (used on US lab reports) and mmol/L (used in Canada, the UK, and most of the world). If you are comparing a US report against international guidance — or reading Canadian material like the Heart and Stroke Foundation's — the converter saves you the arithmetic.
Everything here draws on established public references such as the National Heart, Lung, and Blood Institute, MedlinePlus, and the American Heart Association, and each page links to them. Nothing here is medical advice: what a number means for you is a conversation for you and your clinician.