Fred Lampropoulos
Analyst · Wells Fargo
Thank you, Brian. And let me start with a brief agenda of what we will cover during our prepared remarks. I will start with an overview of our financial results and key operating progress areas during the quarter. After my opening remarks, Joe will provide a summary of our revenue results before turning the call over to Raul, who will provide you with a more in-depth review of our quarterly financial results. Then we will open the call for your questions.
Now beginning with a review of our first quarter results. We reported total revenue of $323.5 million in the first quarter, up 8.7% year-over-year on a GAAP basis and up 9.3% year-over-year on a constant currency basis. The constant currency revenue growth we delivered in the first quarter was stronger than the high end of the range of growth expectations that we outlined on our fourth quarter earnings call. Specifically, we expected constant currency revenue growth for the first quarter in the range of 6.5% to 7.7% year-over-year. Importantly, the better-than-expected constant currency revenue growth in the first quarter was primarily driven by strong organic growth as well as contributions from acquired products, which modestly exceeded our expectations as well.
With respect to our profitability performance in the first quarter, we leveraged the solid revenue results to deliver non-GAAP gross profit and operating profit growth of 10% and 16%, respectively, which resulted in year-over-year margin expansion of approximately 80 basis points and 115 basis points, respectively. And we delivered 19% growth in our non-GAAP EPS, which exceeded the high end of our expectations as well. We are pleased with a solid start to the fiscal year and remain confident in our team's ability to deliver continued strong execution, stable constant currency growth, improving profitability and solid free cash flow generation in 2024.
Now before turning the call over to Joe, I would like to share a brief update on several areas of operational progress in recent months. First, with respect to new product introductions, we have had a solid start to 2024 with multiple regulatory clearances and commercial introductions, including -- in January, we announced FDA 510(k) clearance for the SCOUT MD Surgical Guidance System. This new guidance system demonstrates Merit's ongoing leadership in oncology and marks a significant advancement in breast cancer care as it supports implantation of up to 4 different reflector configurations designed to pinpoint tumor location in multiple dimensions for a more precise excision. This targeted approach can help minimize damage to surrounding healthy tissue, decrease the likelihood of re-excision and avoid the emotional and physical trauma associated with a second surgery.
In March, we announced the commercial release of the Micro ACE Advanced Micro-Access System, a complementary solution that expands our portfolio, our percutaneous access and closure devices. The Micro A System represents innovative technology to improve interventional access procedures as it balances stiffness and flexibility to offer twice the resistance to kink and compression over the leading competitor. It also is 9% stiffer than the leading standard micro introducer.
In addition, a unique market tip design allows for 9x greater visibility under poroscopy for accurate positioning needed at the start of a procedure. We developed this system based on feedback from our interventional physician customers and is another example of partnering with our customers to advance vascular access, procedures, outcomes and improve patient care.
Second, with respect to our progress in the area of clinical validation in recent months, in January, we announced the successful enrollment of the first patient in our MOTION study. This study is a multicenter, prospective, randomized controlled trial comparing genicular artery amortization or GAE using Merit's Embosphere Microspheres to corticosteroid injections for the treatment of symptomatic knee osteoarthritis, a condition that impacts more than 650 million adults globally. GAE is a minimally invasive procedure that selectively reduces blood flow to areas of the knee where hyper vascularity has been identified, helping to alleviate pain and information associated with knee osteoarthritis.
The MOTION study is designed to enroll up to 264 adults with symptomatic knee osteoarthritis across medical centers in North America, Brazil, Europe, Australia and New Zealand. The study is structured to evaluate primary safety and effectiveness of the Embospheres at 6 months with continued patients follow up for 24 months. Finally, we are pleased with the progress achieved in recent months for our WRAPSODY Arteriovenous Access Efficacy or WAVE pivotal study, we completed collection of safety and efficacy outcomes throughout the study follow-up period and receive primary endpoint data for the last enrolled patient during the first quarter. The team has recently completed the monitoring, data cleaning and analysis phase, and we remain on track to complete the clinical study report and continue to expect to be in a position to file primary outcomes with the FDA for premarket approval or PMA by the end of the second quarter of 2024.
Now with that, let me turn the call over to Joe, who will review the first quarter revenue performance. Joe?