Medtronic Inc.'s (MDT) fiscal first-quarter profit tumbled 39%, weighed down by $360 million in charges for stent-related legal settlements, though the big medical-devices maker's core earnings and revenue beat expectations.

Chairman and Chief Executive Bill Hawkins credited the results to "solid performance" across the board. Medtronic noted that launching the drug-coated Endeavor stent in Japan during the quarter helped push coronary revenue up 1.1% to $353 million. The business had seen a decline in the prior quarter, while the latest results were also aided by the period having an extra week.

Medtronic last month agreed to pay Abbott Laboratories (ABT) $400 million in a settlement concerning design and delivery systems for its stents, scaffolding-like devices that prop arteries open. The deal is expected to free Medtronic to focus more on efforts to improve health care for vascular-disease patients.

For the period ended July 31, Medtronic's profit dropped to $445 million, or a 40 cents a share, from $723 million, or 64 cents a share, a year earlier. Excluding 39 cents in charges, 32 cents of which was related to the stent settlement, earnings rose to 79 cents from 72 cents.

Net sales rose 6.1% to $3.93 billion.

Analysts polled by Thomson Reuters were expecting 78 cents a share on revenue of $3.82 billion.

Medtronic is the biggest player in the heart-rhythm business, controlling about half of the $6 billion global market for implantable cardioverter defibrillators. But it is feeling pressure in that market and its spinal-products business, which has been under pressure since a Food and Drug Administration notice last summer regarding complications when a bone-graft product is used in an unapproved manner.

But both segments saw sales gains in the quarter. Sales Heart-rhythm devices rose 3% as ICD sales edged up 1%. The spinal business had 7% growth. Cardiovascular revenue, which includes the stent unit, rose 9%.

Medtronic shares were flat premarket at $38.

-By Mike Barris, Dow Jones Newswires; 212-416-2330; mike.barris@dowjones.com