<prompt> All of the following statements regarding the ECG changes in acute pericarditis are true, except:Sinus tachycardia is a common findingPR segment depression is present in majority of patientsGlobal ST segment elevation is seen in early pericarditisT wave inversions develop before ST elevation return to baseline  <response>: In acute pericarditis, T wave inversion occur only after the ST segment return to the baseline level. Ref: Practical ECG Interpretation: Clues to Hea Disease in Young Adults By George Stouffer, Page 124 