aortic stenosis, aortic regurgitation and mitral regurgitation
Smoking causes heart disease and increases your chance of heart failure vastly. If your heart is already in bad shape which it is if you need a mitral valve replacement which is on the left side of the heart. Then I would say that you are only damaging the heart even more if it is in bad shape as is.
The valve
The valve between the heart and the aorta is the aortic valve, and the valve between the heart and the pulmonary artery is the pulmonic valve.
The symptoms of canine heart disease is similar to other heart ailments like respiratory coughing,murmur in the heart,slow/fast heart beats,weight loss,weakness,lethargy and fluid retention in the lungs with heart valve failure.
There are four valves in the heart--the aortic valve, pulmonary valve, mitral valve, and tricuspid valve--each at the exit of one of the heart's four chambers.
Class III refers to the degree of congestive heart failure, but not directly to mitral valve prolapse. Ask your cardiologist if you have any degree of heart failure as a result of mitral valve prolapse.
It will progress to terminal stage heart failure
Pulmonary valve
An incompetent valve allows backflow of blood.
The valves of the heart become less pliant over time. Also, calcium deposits may develop on the valves, preventing them from sealing completely. this can result in mitral valve prolopse, mitral regurgitation and ultimately congestive heart failure.
Acute dyspnea can be caused by disturbances of the heart rhythm, failure of the left ventricle, mitral valve (a heart valve) dysfunction, or an embolus (a clump of tissue, fat, or gas) that is blocking the pulmonary circulation
Generally healthy but are prone to mitral valve heart disease: a deterioration in one of the four sets of mitral valve's in a dog's heart. When it strikes, the mitral valve atrophes. The valve doesn't fully close after each pumping action, allowing blood to float backwards from the ventrical into the adrium. This can lead to valve collapse and ultimatley, heart failure.
the valve would fail to close or would invert when the heart contracts, this may cause heart failure.
This causes the heart to make a gurgling sound that is called a heart murmer.
Abnormal heart sounds called murmurs are usually a result of faulty valves. For example, an incompetent valve fails to close tightly, so that blood leaks through the valve when it is closed. Another example, an incompetent bicuspid valve produces a swishing sound immediately after the first heart sound.
When blood enters the pulmonary valve of the heart it flows away from it and enters the lungs. As a result, oxygen is picked up by the lings and transferred back through the pulmonary valve to the heart.
Smoking causes heart disease and increases your chance of heart failure vastly. If your heart is already in bad shape which it is if you need a mitral valve replacement which is on the left side of the heart. Then I would say that you are only damaging the heart even more if it is in bad shape as is.