Michael F. Mahoney
Chairman and Chief Executive Officer at Boston Scientific
Thanks, Lauren, and thank you everyone for joining us today. Our first quarter performance exceeded our expectations across all business units and regions, which is a testament to the winning spirit of our global team and their relentless focus on innovation and execution. We also launched more than 70 new products globally in 2022.
In the first quarter of 2023, total company operational sales grew 15% versus 2022, while organic sales grew 14%, exceeding the high-end of our guidance range of 6% to 8%. We believe that all business units grew faster than their respective markets with differentiated portfolios and a strong commercial execution, supported by healthy procedural demand. First quarter adjusted EPS of $0.47 grew 19% versus 2022, exceeding the high-end of the guidance range of $0.42 to $0.44. First quarter adjusted operating margin was 25.5%, which is in line with our expectations.
Now for our 2023 guidance. For second quarter '23, organic revenue we're guiding to growth of 7% to 9% and full year organic growth of 8% to 10%. Our second quarter '23 adjusted EPS estimate is $0.48 to $0.50, and we're guiding to a full year adjusted EPS range of $1.90 to $1.96.
I'll now provide additional highlights on first quarter, along with comments on our 2023 outlook, and Dan will provide more details on the financials. Regionally on an operational basis, the US grew 13% versus first quarter of '22, inclusive of a 140 basis point tailwind from the Baylis acquisition with notable strength -- with notable organic strength across all our business units. Europe, Middle East and Africa grew 20% on an operational basis versus first quarter '22, with nearly every market growing double digits in the quarter. The strong above-market growth is driven by our diverse portfolio, new launches and commercial execution with healthy underlying market demand. We remain excited about the year ahead and expect to continue to outpace our peers within the EMEA market.
Asia-Pac grew 15% operationally versus first quarter '22, with broad-based strength across all major markets and business units. Within the quarter, we're pleased to have received Health Sciences Authority approval for FARAPULSE in Singapore. Expanding access of this innovative new technology to more patients.
In Japan, first quarter growth was fueled by the launch of AGENT Drug-Coated Balloon, a differentiated coronary drug-coated balloon for in-stent restenosis and small vessels, with physicians pleased with ease-of-use and balloon deliverability. China also grew double digits in the first quarter, ahead of our expectations with solid procedural demand as hospitals worked through COVID delayed procedures. Our diverse portfolio in China, commercial execution and supply chain management within the country supported the strong performance in the quarter. In February, we also closed our majority stake investment in Acotec, further expanding our presence in the market and we continue to expect double-digit growth in China for the full year.
I'll now provide some comments on our business units. Urology sales grew 16% organically. All four franchises grew double digits in the quarter with strength in key products including LithoVue and Rezum. In the US, we received FDA clearance and initiated a limited market release for LithoVue Elite, which is a single-use flexible ureteroscope, which incorporates an innovative pressure sensing capability that will enable physicians to monitor intrarenal pressure during stone removal procedures
Endoscopy sales for the quarter grew 11% organically versus first quarter of '22, with broad-based strength across all regions and franchises. Our single-use imaging franchise grew double digits. So we're pleased to have recently launched our third-generation Exalt D, with improved ergonomic design updates to improve the physician experience.
In April, we closed the Apollo Endosurgery acquisition, which furthers -- furthers our category leadership strategy within the important area of endoluminal surgery. With differentiated technologies like OverStitch and X-Tack, along with an entry into the adjacent endobariatric market. Neuromodulation sales grew 14% organically versus first quarter '22. Our pain business grew high single digits in the quarter with strong SCS performance-driven by our innovative Alpha portfolio with fast therapy and our cognitive suite of digital tools supporting patient activation.
Our Brain franchise grew double digits in the quarter, driven by new product launches including Guide XT, which was developed in collaboration with Brainlab. This revolutionary software provides implanting and managing clinician -- the ability to model the effect of a patient stimulation ahead of actual programing, which will improve procedural efficiency.
In the quarter, peripheral interventions also grew 12% organically versus first quarter '22. Our arterial franchise grew double digits, led by our drug-eluting portfolio, establishing clear leadership in SFA drug elution, further supported by our differentiated ELUVIA long length DES. Our venous franchise growth was driven by ongoing above-market performance in Varithena. And within the quarter, we launched EKOS+ in the US, which provides more ultrasound power to resolve clot burden more quickly and completely.
Our interventional oncology franchise grew double digits with strength across -- with strength across the entire portfolio. We look forward to initiating our limited market release in second quarter for Obsidio, the first conformable embolic indication for the peripheral vasculature. Cardiology delivered another excellent quarter with operational sales growing 17% and organic sales growing 15% versus first quarter '22. Within cardiology, interventional cardiology therapies sales grew 13%. Our coronary therapies franchise grew low double digits in the first quarter, led by strong performance within our imaging portfolio with particular strength in the US with the ongoing launch of AVVIGO Guidance System.
Our structural heart valves franchise continues to grow strong double digits and we're pleased to have completed enrollment on our ACURATE IDE trial and continue to expect to launch ACURATE neo2 within the US in the second half of 2024. WATCHMAN sales grew 29% organically versus first quarter '22. Demand remains very strong for WATCHMAN FLX, and we now have treated more than 300,000 patients globally since launch.
We are proud of our performance to date and we continue to invest for the future through product innovation solutions and clinical evidence. Last week, the Population Health Research Institute announced the ID approval of [Indecipherable] which is a collaborative research study with Boston Scientific, that will continue to expand our LAAC clinical evidence. This trial is expected to start in mid 2023. It will complement the existing CHAMPION-AF and OPTION trials.
Cardiac Rhythm Management sales grew 8% organically versus first quarter '22. Our diagnostics franchise grew strong double digits in the quarter with continued momentum across the portfolio. A core CRM, both our high voltage and low voltage businesses grew mid single digits, and we believe that all major markets were in line or slightly above market growth. We do expect our core CRM growth to taper closer to market growth for the remainder of '23, as replacement tailwinds neutralize.
Electrophysiology sales grew 54% operationally and 31% organically versus first quarter '22. Our international EP business grew 40% and importantly, the EMEA region grew our EP business 57%, driven by strong adoption of FARAPULSE and POLARx.
We continue to invest in the expansion of our portfolio and received approval in Japan, Canada and Europe for POLARx FIT, which is an expandable balloon catheter capable of creating 28 and 31 millimeter sizes, providing procedural adaptability and efficiency. And just last week, one year outcomes data from the MANIFEST PF registry represented as a late breaker at EHRA. This is the first large real-world dataset on a novel ablation technology, which demonstrated a real-world safety, efficacy and efficiency of the FARAPULSE PFA system. The data also reinforced the minimal learning curve and reproducibility of the FARAPULSE workflow and everyday commercial use.
We continue to advance our clinical evidence within this space and initiated enrollment in ADVANTAGE AF trial, which is studying the use of FARAPULSE for patients with persistent atrial fibrillation. We also look forward to the readout of our ADVENT US ID randomized controlled trial in the second half of this year and continue to expect the approval in the US in '24. We're also very pleased with the performance of our Access Solutions franchise, which grew strong double digits in first quarter, driven by further penetration into transseptal crossing procedures.
Last week, we released our '22 performance report, outlining our environmental, social and governance results. We are pleased with the progress our global teams have made to advance sustainable innovation, while contributing to a healthier planet, addressing inequities and supporting communities around the world. We have much more to do and our values based culture will serve us well as we continue to transform lives and hold ourselves accountable to our commitments.
We are confident the year ahead will bring many more exciting milestones across each of our business units and we remain committed to our financial goals of consistently growing faster than our underlying markets and our peer group, expanding operating margins and delivering double-digit adjusted EPS growth with strong free cash flow generation. We also look forward to hosting our hybrid Investor Day event on September 20th.
With that, I'll pass it off to Dan to provide more details on the financials.