Medical Group Clinic Cardiology | Southwest Houston Office
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Memorial Hermann Medical Group Cardiology Southwest Office

Medical Plaza 2
7737 Southwest Fwy Ste 700
Houston, TX 77074
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Meet The Southwest Cardiology Medical Providers

Dr. David A. Portugal

Dr. David A. Portugal, M.D.
Interventional Cardiology

Marcin Bujak, MD

Dr. Marcin Bujak, M.D.
Interventional Cardiology

ScheduleNow Memorial Hermann Medical Group(1)

Vincent Depassio

Vincent DePassio, M.S.N., RN, AGACNP-BC
Adult-Gerontology Acute Care Nurse Practitioner

About Your MHMG Southwest Cardiology Clinic

Memorial Hermann Medical Group (MHMG) Cardiology Southwest combines skilled professionals and state-of-the-art technology to deliver highest-quality, patient-centered cardiology services to southwest Houston.

Our team of experienced cardiology specialists focuses on timely prevention and intervention that minimize the risk of heart attack and stroke, but central to our practice are caring and empathetic relationships with patients based on two-way communication and trust.

Why should MHMG be your first choice for health care? At MHMG Cardiology Southwest, you have access to:

  • State-of-the-art diagnosis and treatment in a conveniently located doctor's office for cardiology patients in southwest Houston, including Bellaire, Alief, Westchase, Sharpstown and Missouri City
  • The wealth of clinical resources provided by the Memorial Hermann Medical Group – one of the Houston area’s largest and most experienced physician networks
  • MHMG’s convenient 24/7 online patient portal

Using state-of-the-art diagnostic tools to determine risk factors or the presence of heart disease, our physicians diagnose and treat a complete spectrum of congenital and acquired heart conditions including valve defects, heart failure, heart attack and coronary artery disease. Our services range from basic screening tests to 64-slice CT (computerized tomography) coronary and peripheral vascular angiography.

Our highly experienced specialists also provide leading-edge interventional procedures to treat cardiac and peripheral vascular disease.

Dr. Carter Grinstead is board certified in internal medicine with subspecialty certifications in cardiovascular diseases and interventional cardiology. He earned his medical degree from The University of Texas Southwestern Medical School in Dallas and completed his internship and residential training at Parkland Memorial Hospital and Veterans Administration Medical Center in Dallas. He completed a fellowship in congestive cardiac failure and transplantation at Baylor College of Medicine in Houston. Dr. Grinstead treats patients 18 years and older. His clinical interests include pacemakers, cardiac catheterization and angioplasty stenting.

Dr. J. R. Soto graduated with honors from the University of Puerto Rico School of Medicine in San Juan. He completed his internship, residency and a fellowship in cardiology at Baylor College of Medicine in Houston. Dr. Soto is board certified in internal medicine, cardiology, interventional cardiology, nuclear cardiology and echocardiography. His clinical interests are general cardiology, heart failure and cardiac intervention. He is fluent in Spanish and treats 15 years and older.

Dr. Sanford Lubetkin earned his medical degree from Georgetown University School of Medicine in Washington, D.C., and completed internship and fellowship training from Baylor College of Medicine in Houston. Dr. Lubetkin is board certified in internal medicine, cardiovascular disease and managed care. His clinical interests are preventive cardiology and treating cardiovascular disease, hypertension and increased cholesterol.

Dr. Jon McGregor earned his medical degree at The University of Texas Medical Branch-Galveston (UTMB). He completed a general surgery internship at Ochsner Clinic in New Orleans, an internal medicine internship and residency at Baylor College of Medicine in Houston, and a fellowship at UTMB. He is board certified in internal medicine, cardiovascular disease and echocardiography.

Dr. David Portugal earned his medical degree at University of Texas Health Science Center at Houston (UTHealth) Medical School and completed a residency and fellowship at Tufts University School of Medicine in Boston. Dr. Portugal is board certified in internal medicine with subspecialty certifications in cardiovascular diseases, nuclear cardiology and interventional cardiology. His clinical interests include clogged arteries, blockages, congestive cardiac failure and minimally invasive procedures for heart disease prevention and intervention.

Adult-gerontology acute care nurse practitioner Vincent DePassio, M.S.N., RN, AGACNP-BC, sees patients ages 18 years and older, and assists physicians with outpatient care. DePassio works as an extension of the Southwest Cardiology team and ensures that patients receive quality care.

Memorial Hermann Medical Group Cardiology Southwest is on the campus of Memorial Hermann Southwest Hospital, conveniently located on Highway 59 (the Southwest Freeway) north of Beltway 8 near Houston Baptist University and the Arena Theatre. Ample parking is available in adjacent parking garages and nearby lots.

Southwest Campus Map

 Southwest Campus Map

Patient Testimonials

Dr. Lambert and staff has always gave me the feeling that I would be taken good care of. #1. Wonderful. - Patient of Dr. Lambert

Alana at the front office is super nice, very professional, caring and efficient. - Anonymous

Excellent Mary and Valerie are super good; professional caring and easy to talk to. - Anonymous

I appreciate Dr. McGregor's office manners, patience, & concern about my health. I thank him for listening to me as I told him about my aches, pains & health problems. His last words are "if you need me, don't hesitate to call." I like that. - Patient of Dr. McGregor