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Your EKG shows sinus tachycardia and probably left ventricular hypertrophy (attachment removed to protect patient identity). As you said you had mild valvular leakage, there might be some other problem as well. Therefore I advise you to have echocardiography done. If your heart rate is high at almost all the times then also have ambulatory EKG (Holter monitoring) done for 24 hours. Sometimes this tachycardia is due to anxiety, pain, anemia, infection, and hyperthyroidism. So, ruling out these entities is a must. Followup after having done the advised tests within 10 days, so you can be guided better and proper.
The Probable causes:
Anxiety, anemia, hyperthyroidism, pain, infection.Investigations to be done:
CBC, TSH, echo, 24 hours Holter monitoring, ESR.Treatment plan:
Tablet Atenolol 50 mg daily (only after having Holter monitoring done and ruling out other causes of fast heart rate).