The table shows the number of clinical cases recorded in a healthcare database in 2023 for three cardiovascular conditions. The table also shows the number of these cases associated with smoking.
| Cardiovascular condition | Total number of clinical cases | Number of these cases associated with smoking |
|---|---|---|
| Coronary artery stenosis | 145 000 | 68 000 |
| Cerebrovascular disease | 85 000 | 34 000 |
| Peripheral arterial disease | 170 000 | 78 000 |
What is the total number of clinical cases recorded across all three cardiovascular conditions?
Calculate the percentage of the total number of clinical cases that are associated with smoking. Show your working.
Smoking increases the risk of developing atherosclerosis. Explain how atherosclerosis in the coronary arteries can cause myocardial infarction (a heart attack).
