What is sinus tarchaydia? according to my medical records, i have/had that while recently in the hospital? what causes it?

Sinus=normal: "Sinus" means the rhythm is a normal one, originating in the normal area and conducting through the heart normally. "Tachycardia" means that your heart rate was >100. Sinus tachycardia is a normal rhythm when you're ill, under stress, have a fever, in pain, are exercising, and also during many other circumstances.

Fast heart rate: Sinus tachycardia is an increased heart rate above 100 beats per minute. It can be caused by a host of things from exercise, anxiety, and desire to volume loss and a variety of other medical conditions. It is usually treated by addressing the underlying cause of the increased heart rate.

Fast heart rate: Sinus tachycardia just means a fast heart rate, above 100 beats a minute. Usually this is caused by a patient being in pain or being anxious from being in the hospital; it can also be a sign that someone is dehydrated or has experienced blood loss. The other thing we thing about is too much thyroid hormone (hyperthyroidism). If the fast heart rate has resolved, generally we don't do further eval.

Normal reaction: Sinus tachycardia means your heart rate is fast but regular. This happens during any time of stress or injury or illness or dehydration or even excitement. It is not indicative of much other than an appropriate response during an illness. If your resting heart rate is high (over 100) then you may need more aerobic exercise and it can rarely be abnormal.