1 CARDIOVASCULAR DYNAMICS, INC. STATEMENT REGARDING THE COMPUTATION OF NET LOSS PER SHARE (In thousands, except per share amounts) Three Months Ended September 30, Nine Months Ended September 30, 1998 1997 1998 1997 -------------- --------------- ------------ ------------- Numerator: Net Loss ($1,369) ($2,066) ($5,193) ($3,253) ------- ------- ------- ------- Net loss used for basic and diluted loss per share -- loss attributable to common stockholders ($1,369) ($2,066) ($5,193) ($3,253) ======= ======= ======= ======= Denominator: Denominator for basic and diluted loss per share-- weighted average common shares outstanding 8,854 9,107 8,857 9,098 ======= ======= ======= ======= Basic and diluted net loss per share ($ 0.16) ($ 0.23) ($ 0.59) ($ 0.36) ======= ======= ======= =======