Hello dear,
The fact that 24 hour Holter monitoring & ECG has not shown anything rules out the any Cardiovascular causes for the symptoms.
The symptoms in your friend can be due to:
1. Anemia- either due to decreased
Hemoglobin production or deficiency of certain nutrients like Iron, Vitamin B 12,
Folic acid, etc. which helps in blood formation.
2. Inadequate hydration status & electrolyte balance of the body.
3. Any fluctuation in the blood sugar levels.
4.
Hormonal & metabolic causes.
5. Stress, inadequate sleep, etc.
Investigations like
complete blood count, estimation of blood sugar levels will be helpful to rule out any pathological cause for the symptoms.
And it is also needed that your friend take certain precautions regarding diet & lifestyle, such as:
1. Take soft, plain, non-spicy foods
2. Drink lots of water to maintain adequate hydration
3. Avoid fast food.
4. Avoid smoking & alcohol.
5. Keep away stress..think positive.
6. Exercise regularly & practice
meditation.
Wishing a Good Health.
Thanks & take care.