Resistant & Secondary High Blood Pressure
Expert evaluation for blood pressure that remains elevated despite three medications, including thorough screening for underlying kidney and hormonal causes.
What It Is
High blood pressure is classified as resistant when it remains above target (typically 130/80 mmHg) despite concurrently taking three different classes of antihypertensive medications at optimal doses, one of which is a diuretic. Secondary hypertension refers to high blood pressure directly caused by an identifiable underlying medical condition, most commonly renal artery stenosis, primary aldosteronism, or chronic kidney parenchymal disease.
Why Your Doctor May Have Sent You
Your primary care physician has adjusted multiple blood pressure medications, yet your office and home readings remain dangerously high, or you have sudden severe spikes in blood pressure.
How Our Specialists Help
Dr. Hozayen conducts a systematic diagnostic workup to unmask hidden secondary causes (such as excess aldosterone production, renal artery narrowing, or sleep apnea). We calibrate your home blood pressure cuff, analyze 24-hour ambulatory patterns, and optimize medication timing (chronotherapy) with targeted mineralocorticoid antagonists.
Diagnostic Workup & Testing
We avoid redundant testing by reviewing recent records first, ordering only targeted diagnostic studies:
- Aldosterone-to-Renin Ratio (screening for primary aldosteronism)
- Renal Artery Doppler Ultrasound (screening for renal artery stenosis)
- 24-hour urine free cortisol or fractionated metanephrines (if pheochromocytoma suspected)
- Basic Metabolic Panel with focused electrolyte review
- Home blood pressure monitor validation against clinical-grade sphygmomanometer
Evidence-Based Treatment Pathways
Modern renal medicine focuses on preserving existing nephrons and preventing complications:
- Targeted multi-drug regimens addressing vascular resistance and sodium avidity
- Incorporation of aldosterone receptor antagonists (spironolactone / eplerenone)
- Long-acting loop diuretics or thiazide-like diuretics tailored to eGFR
- Dietary sodium restriction (<2,000 mg/day) and structured lifestyle interventions
Common Symptoms to Monitor
- Persistently high home blood pressure readings (>130/80 mmHg or >140/90 mmHg)
- Frequent morning headaches or facial flushing
- Shortness of breath with mild exertion
- Unexplained low potassium levels on routine bloodwork
- Blood pressure that previously was well controlled and abruptly became difficult to manage
When to See a Kidney Specialist
- Blood pressure remains elevated despite taking 3 or more blood pressure medications
- Requiring 4 or more medications to maintain blood pressure control
- Onset of high blood pressure before age 30 or sudden worsening after age 55
- Unexplained low potassium (hypokalemia) discovered on routine lab tests