Amyl nitrite. [Aml-n]
In acute attacks Amyl nitrite is usually the remedy, it is given by olfaction of the crude substance, It produces a speedy dilation of the capillaries in the upper part of the body, the face becomes flushed, the heart's action is rapid and tumultuous, there is a feeling as of a band around the head, constriction about the heart and oppressed breathing. It is very useful in relieving the paroxysm, and if the symptoms correspond it will be found useful at other times.

Glonoine [Glon]
Nitro glycerine is a very similar remedy. It has been proved and its action is fairly well known. Its grand characteristic is throbbing all over the body in every vessel, a feeling of fulness in region of heart, and perhaps sharp pains radiating in all directions from heart, labored breathing, and fluttering of the heart, it feels contracted.

Arnica
First aid for sever pain in the left shoulder. Elbow of the left arm with stitching pain in the region of the heart.

Cactus
Acute pain with suffocation and a feeling of constriction. Cactus Mother tincture 10 drops in water every 30 minutes till the condition stabilizes.

Homeopathic Remedy Arnica 30C Pellets Value Pack