Palpitations are perceived abnormalities of the heartbeat characterized by awareness of cardiac muscle contractions in the chest, which is further characterized by the hard, fast and/or irregular beatings of the heart. (ncbi.nlm.nih.gov)
leaves, or none, or few do hang Upon those boughs which shake against the cold, Bare ruined choirs, where late the sweet birds sang. What time of year is Shakespeare indirectly referring to
