Hi ! Most probably you had allergic/asthmatic bronchitis
, for which you were given nebulisation in the hospital. Sometimes the drug which are used in nebulisation may cause increase in the heart rate
, but it is a temporary phenomena. However, if the symptoms of tachycardia
persist, then you should see your family physician initially, who may refer you to a cardiologist for futher investigations and needful. Wshing you an early recovery.