If a medication or a medical condition is the cause of constipation, eliminating the offending medication or treating the underlying medical condition may relieve the constipation. However, certain conditions require the use of a medication despite its side effects.
Your heartbeat can be either tachycardic or bradycardic during a heart attack, so no i don't believe you had have a normal pulse rate at the time of a heart attack, normal being around 60-70 beats per minute for an adult. Heart rate does decrease though with age but that doesn't necessarily indicate anything is amiss.
Pulse rate between 60-100 bpm is considered as normal pulse rate. Pulse rate helps assess the health of your heart. High pulse rate conveys the message that your heart is beating faster than normal. High pulse rate at rest indicates that your heart has to work harder to pump blood into the arteries.