Valvular heart disease
What is it?
The heart is a marvel of nature. It is a hollow, muscular organ about the size of your fist. It lies in the centre of the chest, slightly to the left. It beats almost one lakh times a day, day after day, year after year. It is made of a unique muscle called myocardium, which is the main propelling force of the heart. It pumps blood in the body with each beat of the heart. This happens 60-90 times a minute. It’s obvious that for the proper functioning of the heart, the myocardial muscle has to be healthy. Myocardium gets its nutrition and oxygen through blood, which is supplied by coronary arteries.The heart is divided into two parts, the right heart and the left heart. Right heart has two chambers, right atrium and right ventricle. Similarly the left side heart has two chambers – left atrium & left ventricle. So in all, there are four chambers in the heart. The right side of the heart receives impure blood from the body and pumps it into the lungs. Blood gets purified in the lungs and returns to the left side of the heart. From here it is pumped back to the entire body for supply of oxygen & nutrition. Four valves, two on the left side of the heart (mitral and aortic) and two on the right side (pulmonary and tricuspid) act as one-way doors to direct the flow of blood.
What are the symptoms?
The patient may present with shortness of breath, palpitation, chest pain, swelling of the body specially feet, weakness, lethargy and some times blackouts and dizziness/giddiness. In the initial stages the patient may be totally asymptomatic and may have just subtle reduction in effort tolerance.
What are the types?
There are essentially two types of valves:Tissue valves, which are made from the tissues derived from the pigs and cows. These valves have the advantage that they do not need life long blood thinning tablets, but they have the disadvantage that their life is limited and usually a tissue valve lasts from 10-15 years.Mechanical Valve. It is made of a special kind of metal and has the advantage of being long lasting, but the biggest disadvantage with mechanical valve is that blood clots tend to form on them and therefore one has to take blood thinning tablets for life time.
How is the diagnosis made?
Echocardiography (2D or 3D) currently is the gold standard for diagnosis of valvular heart disease and in most cases is able to give definitive answer to all the queries and doubts about the disease process. Some times cardiac catheterization may be required, if echocardiography is not confirmatory in its findings/diagnosis.
What is the treatment?
Rheumatic fever is essentially treated with antibiotics in form of injectable Penicillin or oral erythromycin, if the patient is sensitive to penicillin. For swelling and pain in the joints, any one of the non steroidal anti inflammatory agents can be used, but Aspirin is the most specific. Most patients need no further treatment but in a small percentage of patients, steroids may be needed. Penicillin treatment should be continued for as long as the doctor prescribes it for and should never be stopped in between, as this disease has chance of recurrence and some times penicillin is prescribed as 3 weekly injection till the age of 35 or even beyond as per the clinical demands.
What is the homecare treatment?
After valve surgery, one needs to take blood thinning tablets, specially if it is a mechanical valve, for life long and the levels of blood thinning medicine has to be maintained by doing a test called INR/PT. This test must be done once in a month and the INR level should be maintained around 2.5 – 3.5 times the normal, or as prescribed by the treating physician. In general, low salt and restricted fluid intake are good for healthy life. If there is any problem maintaining the INR level, then one may have to avoid taking green leafy vegetables and tomatos etc. When ever one has to undergo any form of surgical or gynaecological or dental treatment, then one must inform the doctor that there is an artificial valve in his heart, so that the necessary precautions for preventing infection on the valve can be taken by the treating physician. Also if one is taking anticoagulants or blood thinning tablets, then one must carry a warning card in the pocket or in the purse all the time, so that in case of an emergency, treating doctor gets warned about the blood being thin. One must never walk bare feet and be little careful while trimming nails and while using sharp objects, because one is likely to bleed excessively if any injury takes place. In case there are any symptoms, one must report to the doctor immediately and not delay presenting to the hospital.
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