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Revenue
 3 Months Ended
Mar. 31, 2022
Disaggregation of Revenue [Abstract]  
Revenue Revenue
The following table represents the Company’s product revenue based on product line:
Three Months Ended
March 31,
20222021
(in thousands)
Coronary$70,337 $15,308 
Peripheral22,852 16,141 
Other 442 451 
Product revenue$93,631 $31,900 
Coronary product revenue encompasses sales of the Company’s C2 catheters. Peripheral product revenue encompasses sales of the Company’s M5, M5+and S4 IVL catheters. Other product revenue encompasses sales of the Company’s generators and related accessories.
The following table represents the Company’s product revenue based on the location to which the product is shipped:
Three Months Ended
March 31,
20222021
(in thousands)
United States$78,519 $21,045 
Europe12,067 8,222 
All other countries3,045 2,633 
Product revenue$93,631 $31,900