Palpitation may be defined as an awareness of the beating of the heart, an awareness most commonly brought about by a change in the heart's rhythm or rate or by an augmentation of its contractility
College English 3 The Course Curricular Participants: Second-year Students Majoring Time: 9/2001-2/2002 First semester of the Academic Year 2001-2002 Teaching Material: College English (Revised edition published by Shanghai Foreign Language Education Press)