However, we were disappointed that the total revenue growth in the quarter was below our expectations due mainly to a shortfall in sales execution in the Americas region. We have taken decisive action to correct this situation. We expect that the Americas region will be back on track in the second quarter.
So far, we are encouraged by second quarter’s sales to date, which are ahead of last year at this time. While we normally do not disclose any information about the current quarter, we wanted to update you because we are confident that we can achieve our financial guidance provided earlier this year.
On a positive note, I am pleased to report that the first quarter of 2013 gross margin was strong. On a GAAP basis, we achieved gross margin of 77.1% compared to 75.6% in the same period last year. On a non GAAP basis, gross margin reached 78.1% compared to 76.2% last year. Yuval will provide additional financial details shortly.
The most important medical meeting of the year for Given Imaging, Digestive Disease Week begins next week in Orlando. More than 120 abstracts covering our seven PillCam and functional GI diagnostics products will be presented at the meeting. Importantly, data from the PillCam COLON 2 USA pivotal trial to assess the accuracy and safety of PillCam COLON 2 compared to optical colonoscopy in 885 patients will be presented in a podium presentation by lead investigator Dr. Douglas Rex, of Indiana University Medical Center.
Following his presentation in the conference on May 21, we will be hosting a meeting with members of the financial community to review data as well as other highlights.
Dr. Rex, will discuss PillCam COLON 2 data and Dr. Cristiano Spada of Rome will review additional PillCam COLON 2 abstracts. Dr. Sam Adler of Israel will discuss highlights of our next generation PillCam SB 3. This event will also be webcast and we look forward to your participation.
On the PillCam COLON 2 regulatory front, we are encouraged with our advanced discussions with both USA and Japanese regulatory authorities and continue to expect decisions this year.
We started shipping our next generation PillCam SB 3 capsules in Europe and Australia at the beginning of the second quarter. PillCam SB 3 offers physicians enhanced image quality and includes adaptive frame rate technology used in our PillCam COLON 2 capsules.
We have received very positive feedback from physicians, who has begun using the product and believe that PillCam SB 3 will further solidify our global competitive and leadership position.