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Dr. James Hartwell
Interventional Cardiology
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25+
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Centres of Excellence
Specialised, multi-disciplinary centres delivering world-class outcomes.
Cardiac Sciences
Comprehensive heart care — from prevention and diagnostics to complex interventional procedures and cardiac surgery. Hom
Explore →Women's Health
Comprehensive care across every stage of a woman's life — obstetrics, gynecology, breast health, fertility, and menopaus
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Cutting-edge diagnosis and treatment for brain, spine, and nervous system disorders including stroke, Parkinson's, epile
Explore →Nephrology & Urology
Expert kidney, urinary tract, and prostate care — dialysis, kidney transplantation, robotic urological surgery, and inco
Explore →Oncology
Multidisciplinary cancer care with the latest immunotherapy, targeted therapy, robotic surgery, and precision radiation
Explore →Orthopedics & Sports Medicine
Joint replacement, spine surgery, sports medicine, and trauma care — using robotic-assisted techniques for faster recove
Explore →Featured Providers
Meet our most experienced clinicians.
Dr. James Hartwell
Interventional Cardiology
Cardiology
Silvaris Rehabilitation Center — Portland, OR
22+ years experience
Dr. Sarah Thompson
Electrophysiology
Cardiology
Silvaris Cancer Institute — San Diego, CA
17+ years experience
Dr. Michael Chen
Cardiac Surgery
Cardiothoracic Surgery
Silvaris Neuroscience Center — St. Louis, MO
25+ years experience
Dr. Emily Rodriguez
Preventive Cardiology
Cardiology
Silvaris Orthopedic Institute — Tampa, FL
14+ years experience
Dr. Robert Williams
Heart Failure & Transplant
Advanced Heart Failure
Silvaris Community Hospital — Hartford, CT
20+ years experience
Dr. Jennifer Davis
Non-Invasive Cardiology
Cardiology
Silvaris Trauma Center — Denver, CO
12+ years experience
Dr. David Kim
Structural Heart Disease
Cardiology
Silvaris Cancer Center — Nashville, TN
16+ years experience
Dr. Lisa Anderson
Cardiac Imaging & Echocardiography
Cardiology
Silvaris Regional Hospital — Seattle, WA
11+ years experience
Our Hospitals
Flagship facilities with advanced technology.
Patient Stories
Real patients. Real recoveries.
After my heart attack at 58, I was terrified. Dr. Hartwell and the entire SilverOak cardiology team treated me like family. The angioplasty went perfectly, and I was back at my garden in six weeks. I cannot thank them enough for giving me my life back.
Margaret Sullivan
Heart Attack Recovery
When I had my stroke, I was brought to SilverOak's Comprehensive Stroke Center within the golden hour. Dr. Johnson's team performed a thrombectomy that restored full movement to my left side. Today I am walking, driving, and coaching my son's baseball team again — things I thought I would never do.
Robert Chen
Stroke Recovery
Being diagnosed with stage II breast cancer at 44 was the scariest day of my life. But Dr. Wilson and the oncology team at SilverOak walked me through every step — surgery, chemo, reconstruction. Two years cancer-free and counting. This team saved my life.
Denise Washington
Breast Cancer Remission
Health Hub
Latest articles, videos and research from our providers.
Alzheimer's Disease: Early Signs, Risk Factors, and How We Can Help
Alzheimer's disease affects 6.9 million Americans — a number projected to reach 13 million by 2050. It is the most common cause of dementia and the sixth leading cause of death in the United States. Despite this, most families wait 2–3 years after noticing symptoms before seeking a diagnosis. Early warning signs: Memory loss that disrupts daily life (forgetting recently learned information, asking the same questions repeatedly). Difficulty planning or solving problems. Confusion with time or place. Trouble with spatial relationships and visual images. New problems with words — finding the right word, following a conversation. Misplacing things and losing the ability to retrace steps. Decreased judgment. Withdrawal from social activities or hobbies. Changes in mood or personality. Normal aging vs. Alzheimer's: Normal aging causes occasional forgetfulness — forgetting a name but remembering it later, misplacing glasses. Alzheimer's causes forgetting entire conversations or events, repeatedly asking the same question, and getting lost in familiar places. Diagnosis: Early diagnosis opens the door to treatments, allows patients to participate in care planning while still able to do so, and may allow access to clinical trials. Evaluation includes cognitive testing, brain MRI, and increasingly, amyloid PET scans or blood-based biomarkers (amyloid beta, phospho-tau) which can detect Alzheimer's pathology years before symptoms emerge. New treatments: The FDA has approved lecanemab (Leqembi) and donanemab — anti-amyloid monoclonal antibodies that slow the rate of cognitive decline by 35% in early Alzheimer's. These are the first drugs to alter the course of the disease rather than just manage symptoms. SilverOak's Memory Care Program is an approved infusion site for lecanemab. Risk reduction: While genetics play a role, modifiable factors account for up to 40% of Alzheimer's risk. Regular aerobic exercise, a heart-healthy diet, adequate sleep, social engagement, cognitive stimulation, blood pressure control, no smoking, and managing hearing loss are all associated with reduced dementia risk. Dr. Christopher Martinez leads SilverOak's Memory Care and Cognitive Neurology Program at SilverOak Medical Center, San Francisco. Early memory consultations and cognitive assessments are available in-person and via video. Family caregivers can also call for guidance and referrals to support resources.
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Arthritis and Joint Pain: What You Need to Know
Arthritis is not a single disease — it is an umbrella term for over 100 conditions causing joint pain, stiffness, and swelling. It affects 58.5 million Americans, making it the leading cause of disability in the country. The two most common forms are osteoarthritis and rheumatoid arthritis. Osteoarthritis (OA): The wear-and-tear form of arthritis, OA develops when cartilage — the protective cushion between bones — breaks down over time. It most commonly affects knees, hips, hands, and spine. Risk factors include age over 50, obesity (each pound of body weight places 4 pounds of stress on the knee), prior joint injury, and family history. Rheumatoid arthritis (RA): An autoimmune disease in which the immune system attacks the joints, causing inflammatory synovitis. RA typically affects the small joints of the hands and feet symmetrically and can cause systemic inflammation affecting the heart, lungs, and eyes. Early aggressive treatment with disease-modifying drugs (DMARDs) prevents joint destruction. Distinguishing OA from RA: OA is characterized by pain that worsens with activity and improves with rest, minimal morning stiffness (less than 30 minutes), and absence of systemic symptoms. RA causes significant morning stiffness lasting more than 60 minutes, joint swelling and warmth, fatigue, and elevated inflammatory blood markers (CRP, ESR, RF, anti-CCP). Non-surgical management: For OA, first-line treatment includes low-impact exercise (swimming, cycling, walking), physical therapy to strengthen muscles around the joint, weight loss, acetaminophen or topical NSAIDs for pain, and intra-articular corticosteroid or hyaluronic acid injections. For RA, methotrexate is the cornerstone DMARD, escalated to biologic agents (TNF inhibitors, JAK inhibitors) for inadequate response. When to consider joint replacement: Knee and hip replacement are among the most successful surgical procedures in medicine — with patient satisfaction rates above 90%. The timing is right when joint pain is severely limiting daily activities, sleep is disrupted by pain, and 3–6 months of conservative treatment has not provided sufficient relief. Dr. Lisa Mitchell specializes in sports medicine and non-surgical arthritis management at SilverOak Trauma Center, Denver. Dr. Steven Campbell performs robotic-assisted joint replacement at SilverOak Medical Center, Chicago. Consultations available in-person and via video.
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High Blood Pressure: The Silent Killer Most Americans Ignore
High blood pressure (hypertension) affects 120 million American adults — nearly half the adult population. It causes no symptoms until it has already damaged the heart, brain, kidneys, and blood vessels. That is why it is called the silent killer. Understanding the numbers: Blood pressure is measured in two numbers. Systolic (top number) — pressure during heartbeats. Diastolic (bottom number) — pressure between beats. Normal: below 120/80 mmHg. Elevated: 120–129/under 80. Stage 1 hypertension: 130–139/80–89. Stage 2: 140+/90+. Hypertensive crisis requiring emergency care: 180+/120+. Why it matters: Uncontrolled hypertension is the leading risk factor for stroke, the leading cause of heart failure, causes chronic kidney disease and eventual dialysis need, damages retinal blood vessels causing vision loss, and increases dementia risk by 60%. Lifestyle changes that lower blood pressure: The DASH eating pattern (rich in fruits, vegetables, low-fat dairy, and low in sodium) reduces blood pressure by 8–14 mmHg — comparable to one medication. Sodium restriction to under 2,300 mg/day. Aerobic exercise 150 minutes/week reduces blood pressure by 5–8 mmHg. Weight loss of 1 kg reduces systolic blood pressure by approximately 1 mmHg. When medication is needed: Stage 2 hypertension or Stage 1 with cardiovascular risk requires medication alongside lifestyle changes. First-line drugs include ACE inhibitors, ARBs, thiazide diuretics, and calcium channel blockers — all are inexpensive, well-tolerated generics. Most people achieve target blood pressure with one or two medications. Home monitoring is essential: Office blood pressure readings can be elevated by anxiety (white-coat hypertension). A validated home blood pressure monitor (upper arm, not wrist) costs $30–50 and gives a far more accurate picture. Take two readings morning and evening for 7 consecutive days before any medication change. Dr. Emily Rodriguez offers comprehensive cardiovascular risk assessment and hypertension management at SilverOak Regional Hospital, Dallas. Video consultations for hypertension follow-up are available daily.
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