Figure 5. Atrial epicardial mapping Activation -, conduction block- and voltage maps constructed from Bachmann’s Bundle, right atrium, crista terminalis, pulmonary vein area, left atrioventricular groove, left atrial appendage during sinus rhythm, obtained from a patient with coronary artery disease. Electrograms recorded from the middle of the mapping area are shown on top. Arrows in the color-coded activation maps show the main trajectory of the excitation wave. Areas of slow conduction (<18cm/s) and conduction block (<30cm/s) are represented by respectively blue and red lines. Voltage maps show the peak-topeak amplitude of the atrial potentials.