Final answer:
The time of day most hazardous for heart attacks is early morning.
Step-by-step explanation:
The time of day most hazardous for heart attacks is early morning.
Research has shown that there is a higher risk of heart attacks occurring in the morning compared to other times of day. This is because the body experiences changes in blood pressure and heart rate during the morning hours, which can potentially trigger a heart attack in individuals with underlying heart conditions.
Factors such as increased adrenaline levels, dehydration after sleep, and increased physical activity upon awakening can contribute to the heightened risk. Additionally, the release of stress hormones in response to morning activities and the disruption of the body's circadian rhythm can also play a role.