In whatever state of Health you are, you need to take action, now.  Whatever is your age, you need to take action , now.  Yes, Now.  If you are actually healthy, you need to tone up.  In all other states you need to tune up.  But we are all thinking human beings.  We want to know; Is there something wrong.  This question will keep frustrating you, and, you will keep trying to find out.  You will visit doctors and pathology labs.  Data available, yes.  Deductions, none.  Conclusion, relating brand names to disease names.  cure, not in sight.  Fortunately the body has its ways of telling you that something is wrong.  Here are some symptoms ( which you can correlate to a bad Cardiovascular System ).  Keep your observation keen for the following tell tale signs;
Numbness anywhere in the body
Loss of Appetite
Extremities cold
Discoloration of skin
Varicose Veins
Brittle nails
Early loss of hair
Swelling in extremities
Ulcers on legs
Exhaustion of fatigue
Tightness in chest
Loss of Libido or Erectile dysfunction
Forgetfulness or Loss of Concentration
Digestion problems
Therefore, In either case the action is the same.  You need to take herbs, periodically.  Diagnosis is required only if you are really actually positively sick.  In that case, you need medicine and that means a visit to the doctor is a must.  Herbs with their predominant action on the Cardiovascular System are given below.  You need to experiment with each and determine a course of action, all specific to you.  Remember, no herb acts consistently in the same manner in two individuals.  It is recommended that after due experimentation, you make a yearly routine, and follow it for the rest of your increased and Vibrantly Healthy life.  Herbs for your Heart are:
Arjuna :  Arjuna possesses cardiotonic ability. Very useful to treat Cardiovascular diseases. It protects the heart, strengthens circulation, and helps to maintain the tone and health of the heart muscle. It is also useful in stopping bleeding and to promote healing after a heart attack.  The best way to take Arjuna is to take Arjuna Terminalia mother tincture 10 drops in water, morning evening.  You may also boil Arjuna bark powder in milk and consume it twice a day.

Lavender Essential Oil : Lavender has anti-inflammatory property. It reduces inflammation of the heart. It inhibits cortisol production in the body. Therefore, it is one of the best herbs for improving blood circulation in the body.
Put 4 drops of Lavender Essential oil in 30 ml of hot water. Inhale its aroma for 30 to 45 minutes. This will decrease the tension in the arteries and veins and reduce your blood pressure.

Hawthorn : It regulates coronary blood flow,  ( Circulation of blood for the heart itself ). Hawthorn diminishes the deposition of fatty substances in arteries of the heart.  It relaxes the heart muscles.  It rejuvenates the cardiovascular sytem.
Prepare  tea by adding 2 to 3 leaves of Hawthorn in a cup of water. Have it two times a day. Try this for a month or take 10 drops of Crataegus Oxyacantha mother tincture in a little water twice daily.  Please experiment, and stop if it does not suit you.  Conslut a doctor under all circumstances.

Motherwort : It prevents heart palpitations.  The alkaloids in this Herb have a relaxing effect on the muscles of the heart.  It lowers blood pressure and heart rate.  Consume a decoction of Motherwort roots once a day.

Garlic :  Garlic has the blood thinning property.  Therefore, it prevents the risk of heart attack and heart diseases.   Garlic enhances the production of nitric oxide and hydrogen sulfide which relaxes the blood vessels. It prevents Blood Clotting. Its vasodilative action  maintains a healthy blood flow, slows down the pulse rate and decreases pressure on the heart.  Improves the flow of blood to the heart itself. It may be taken in any form; raw clove, powder, capsule, oil, tincture.  It can even be taken as a suppository.

Cayenne : It strengthens the heart muscles.  Its vasodilative action and ability to open arteries, allows critical blood flow to the heart itself.  Very useful to prevent or in cure a heart attack.  It has the ability to restore normal action of the heart within seconds.  Best taken in tincture form.  

Ginkgo : It improves blood circulation to other organs. It removes plaque deposition in the arteries. It has an antioxidant property. It protects the heart by preventing the formation of Free radicals. This Herb aids in a smooth circulation to the entire cardiovascular system.  Best taken in capsule form.

Gynostemma : This herb makes it easier for the heart to pump blood throughout the body and reduces blood pressure.

Notoginseng : It regulates the heart beats. Acts as a protector of the heart.  Lowers blood cholesterol. Promotes healthy circulation.

Korean Ginseng :  Ginseng shows promise for protecting heart health.  It has anti hypertensive effects and protects  against heart failure symptoms of heart disease and support its healthy functioning.

Maitake : Take  one Maitake capsule before going to bed for a week.  If it suits you, continue for a month, else Stop.

Ashwagandha :  Its an all rounder.  Tones up all organs and organ systems.  It is hot in nature.  Prefer it in winter. Its hot nature is considerably reduced by taking it with warm milk.  Best taken in tincture form.  It is popular as Ashwagandha but in the West it is known as Withania Somnifera.

Most herbs show an affinity for specific Organs or Organ Systems.  There is a link between the Systems and the Herbs.  Use that link to your advantage.  And, do it fast.  Before Phytotherapy as a science, takes it upon itself to isolate chemicals from the herbs and link them to disease names.