<unk>  is a medical condition, easily confused with<unk> s alternans. Similar features between<unk>  and<unk> s alternans are strong peak and weak peak. However, unlike<unk> s alternans, the weak beat in<unk>  occurs prematurely (early). Thus, not followed a pause as it is in<unk> s alternans but occurs close to normal strong beat.
Bigeminal pulse
Frontal release sign
Inverted binocular phenomenon
Precordial thump
Blue field entoptic phenomenon
Entoptic phenomenon
Carotid bruit
Empty delta sign