Brief Answer:
Can be due to congestive cardiac failure.

Detailed Answer:
Hi ,
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Have noted all your details.

Your symptoms can be most likely because of congestive cardiac failure.

Cardiac failure is not indicative of a defect in heart; but it's a situation when the heart pumps weaker than what is generally deemed as natural. Therefore the blood flows at a slower rate to the heart and the body that in turn increases pressure in the heart. In an attempt to hold more blood, heart stretches it's chambers. Though this strenuous effort may keep the blood moving, it would gradually and inevitably weary the heart with all the effort.

Subsequently, the kidney responds by retaining more salt and fluid in the body. These fluids may accumulate in different parts of the body, mainly in the legs, feet, ankles leading to congestion in the body. This very condition in medical terminology is referred to as congestive heart failure.
Most common cause of CHF at age of 70 is Coronary artery disease.

I would suggest you some of the baseline tests of cardiology to rule out any element of Coronary artery disease apart from 2D-echocardiography.

Stress test- Any ischemia to cardiac muscles will be reflected in stress test. Along with 2D-echo, they have a sensitivity rate of more then 85% to rule out coronary artery disease.

Other tests advised are--

-Liver function test (to rule out liver as a cause of symptoms)- Liver failure can also cause fluid overload in body.

-Renal function test(To rule out any underlying kidney problem)

-Fasting lipid profile
-Thyroid profile-Hypothyroidism can lead to pedal edema.


-Fasting and postprandial blood sugar


As per your query, regarding the Zoloft it has nothing to do with your symptoms,Infact all the medines you are on have nothing to do with your symptoms.

In case you have any other specific query i would be happy to help.

Thanks

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