At this age its not abnormal to have high blood pressure bouts sometimes but when she is okay now, no need to worry. Shaky heart denotes rapid palpitation. May get Thyroid test done and Blood sugar for any hypoglycemic effect just to exclude. tachycardia may be excluded too. All these possibilities may be excluded only after tests but my experience prompts me to tell you to opt for an Ayurveda course - safe, no side effects, economic, easy to take and even may be given to healthy persons. Arjuna is a herb (Terminalia arjuna) whose bark is given in powdered form. Available in capsule form too by Himalya herbs co. It may be given with Amla (Indian gooseberry powder in capsule form ) and Prawal pishti (powder made of Corals). These are natural things. If you give it to your mother , you may start seeing the changes yourself. However if you are not satisfied, other tests can be done anytime and toxic drugs can be started anytime. Better to meet any Ayurveda doctor near you to get decisions of dosage etc. These capsules are available all over the world. Prawal Pishti has to be found out. I hope this will do away your worries.