I also have problems with leg swelling, they feel full, and my hands swell quite often. I have noticed an increase in heart rate lately. Am I worrying overly about this, there was never a reason given for the rapid heart rate and they were hesitant to even give the description of sinus tachycardia to it. Ventricular tachycardias are more serious in nature and are due to a rapid depolarization of the ventricles. Sinus tachycardia is defined as a heart rate of greater than 100 beats per minute originating from the sinus node.
Sinus tachycardia is classified as either appropriate or inappropriate.
There are many causes of appropriate sinus tachycardia such as exercise, anxiety, panic attacks, dehydration, deconditioning, volume loss due to bleeding or other loss of body fluids, hyperthyroidism, electrolyte abnormalities and many other conditions. In addition PVC's may cause the symptoms you are describing. The best way to diagnosis these is to keep a record of episodes during the period of time of the Holter monitor. This way symptoms can be seen to correlate with specific heart rhythms. Inappropriate sinus tachycardia can only be diagnosed when all causes of appropriate sinus tachycardia have been ruled out.