no. Unless it's heart pain --a condition called angina pectoris which is caused by blocked arteries in the heart. Slowing the heart in that situation causes the heart to need less oxygen and have less frequent and severe angina. Beta blocker drugs do this. But slowing your heart won't help your Back pain, kidney stone pain, etc.
A beta-blocker
The Yoga Exercise is the best for gradually slowing down the resting heart rate. Reduce your stress, medical conditions, caffeine, alcohol, tobacco, and supplements then your heart rate gradually slow down and you’ll feel better.
It can cause you to vomit, have abdominal pain and reduce your heart rate.
pain does increase your heart rate
Cooling slows heart rate, thus slowing the pulse rate.
It is a blood pressure medication. Diltiazem is in a group of drugs called calcium channel blockers. It works by slowing the electrical conduction in the heart, slowing heart rate, and/or normalizing heart rhythm. Diltiazem is used to treat hypertension (high blood pressure), angina (chest pain usually caused by lack of oxygen to the heart), and certain heart rhythm disorders).
Beta-blocker
Yes it does. The brain will associate color with memories, affecting the heart slowing or quickening your pulse rate.
The vagus nerve (cranial nerve X) is responsible for slowing the heart rate (parasympathetic control) and accelerating peristalsis in the gastrointestinal tract.
Several factors can contribute to slowing down the heart rate, including physical fitness, relaxation, certain medications, and medical conditions such as hypothyroidism or an electrolyte imbalance.
The peripheral autonomic nerve releases acelycholine to reduce the heart rate.
The parasympathetic nervous system helps regulate heart rate by slowing it down. It works in opposition to the sympathetic nervous system, which speeds up heart rate.