Table 1

Mechanical and histological data

Sample	Pressure–volume analysis	Visual findings	Histopathology
Pressure–volume elastic characteristic
E1	Elastic		Plaque to internal elastic lamina
E2	Elastic		Plaque to internal elastic lamina
E3	Elastic		Plaque ruptured internal elastic lamina
E4	Elastic		Plaque ruptured internal elastic lamina
E5	Elastic		Plaque ruptured internal elastic lamina
E6	Elastic		Plaque ruptured internal elastic lamina
E7	Elastic		Plaque to internal elastic lamina, > 50% circumference
E8	Elastic		Plaque to internal elastic lamina

Pressure–volume plastic characteristic
P1	Plastic 25 kPa^1-150		Plaque superficial
P2	Plastic 30 kPa^1-150		Plaque splitting of internal and external elastic lamina, 50% circumference
P3	Plastic 45 kPa^1-150		Plaque splitting of internal and external elastic lamina, 25% circumference
P4	Plastic 80 kPa^1-150		Plaque 50% circumference, intima and media separated
P5	Plastic 175 kPa^1-150		Plaque to adventitia
P6	Plastic 135 kPa^1-150	7 mm linear tear	Plaque to external elastic lamina with multifocal involvement

Pressure–volume fracture characteristic
F1	Fracture 210 kPa^†	10 mm linear tear	Plaque > 75% circumference, calcified, fractured
F2	Fracture 230 kPa^†		Plaque ulcerated, disruption of intimal plaque
F3	Fracture 540 kPa^†	Tear	Plaque to external elastic lamina, calcified

↵1-150 Maximum pressure difference between first and subsequent inflations; ^†pressure at which fracture occurred.