The document defines several key terms related to cardiac health, fitness, and disease: 1) Stroke volume, heart rate, cardiac output, blood pressure, and maximum heart rate and their normal levels and definitions. 2) It describes the pathways of adrenaline and noradrenaline in increasing heart rate and blood flow. 3) Acetylcholine decreases heart rate by decreasing the firing of the sinoatrial node. 4) Factors that can lead to hypertension include high salt intake, high LDL cholesterol, and regular use of stimulants like caffeine and nicotine. Embolism and aneurysm are also mentioned.

1. Cardiac Health, Fitness and Disease

10. Acetylcholine vs. Noradrenaline

12. Embolism

13. Aneurysm Bulging of the arteries