This week, 7 Health Care Equipment & Supplies stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Medtronic Plc (MDT) shows solid improvement this week. The company’s rating rises from a C to a B. Medtronic Plc develops therapeutic and diagnostic medical products. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of MDT stock.

The rating of Nevro Corp. (NVRO) moves up this week, rising from a B to a A. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of NVRO stock.

This is a strong week for AtriCure, Inc. (ATRC). The company’s rating climbs to B from the previous week’s C. AtriCure, Inc. engages in developing, manufacturing, and selling cardiac surgical ablation systems designed to create precise lesions or scars in cardiac tissue in the United States and internationally. For more information, get Portfolio Grader’s complete analysis of ATRC stock.

Fonar Corporation (FONR) is seeing ratings go up from a B last week to a A this week. Fonar Corporation designs, develops, manufactures, and sells magnetic resonance imaging scanners for the detection and diagnosis of human disease. The company also gets A’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of FONR stock.

This week, Volitionrx Limited (VNRX) pushes up from a C to a B rating. The company also gets A’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of VNRX stock.

Xtant Medical Holdings, Inc. (XTNT) earns a B this week, jumping up from last week’s grade of C. The company also gets A’s in sales growth and earnings surprise. For more information, get Portfolio Grader’s complete analysis of XTNT stock.

Milestone Scientific Inc. (MLSS) boosts its rating from a C to a B this week. For more information, get Portfolio Grader’s complete analysis of MLSS stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.