Scientific Combination and Crisis Response: Building a Complete Closed Loop for Hypertension Management and Monitoring

Most patients require combination therapy with antihypertensive drugs. Common combinations of antihypertensive drugs: Most hypertensive patients need to use two or more drugs together. Low-dose combination therapy is recommended. Current evidence-based clinical trials support the following categories of antihypertensive drug combinations: ARB or ACEI + calcium channel blocker; ARB or ACEI + diuretic; ARB or ACEI + calcium channel blocker + diuretic; calcium channel blocker and diuretic; calcium channel blocker (dihydropyridine) and β-blocker. β-blockers and diuretics have been a highly recommended combination for many years, but considering their adverse effects on glucose and lipid metabolism, it is recommended to discontinue this combination; α-blockers and β-blockers are also recommended to be discontinued.

Combination therapy for antihypertensive drugs should be considered in special populations. ACEIs or ARBs are commonly used: In addition to lowering blood pressure, ARBs and ACEIs have been increasingly widely used recently due to their special repair effects on vascular structure and function. The latest guidelines for coronary artery disease and cerebrovascular disease recommend that patients with coronary artery disease and cerebrovascular disease without symptomatic hypotension, especially those with a history of myocardial infarction, heart failure, angina pectoris, or diabetes, should take ARBs/ACEIs. Similarly, the diabetes guidelines indicate that ARBs/ACEIs should be started if microalbuminuria or other signs of kidney damage occur. In summary, for hypertensive patients with coronary artery disease, cerebrovascular disease, abnormal glucose and lipid metabolism (or metabolic syndrome), or those assessed as having a high risk of myocardial infarction and stroke, ARBs (e.g., telmisartan) or ACEIs can be the first choice without contraindications. If blood pressure does not reach the target level after 4-5 weeks of medication, other medications should be added. When combining ACEIs/ARBs with other drugs, the following should be considered: Because ARBs/ACEIs have a potassium-sparing effect, combining them with potassium-sparing diuretics, such as spironolactone, amiloride, or triamterene, can cause hyperkalemia, requiring special caution. Because ARBs/ACEIs have potassium-sparing effects, combining them with thiazide potassium-depleting diuretics offers unique advantages, resulting in a synergistic effect greater than the sum of its parts (1+1>2). The efficacy is enhanced, and a combination of 1/4 or 1/2 tablets, taken every other day or daily, produces a very good combined effect; therefore, combined use is the preferred choice.

The combination of ACEIs/ARBs and calcium channel blockers has been proven by recent studies to be the best pairing. If blood pressure is not controlled after 4-5 weeks of combined medication with two drugs, a third drug may be added. Consider the following: congestive heart failure: beta-blockers (metoprolol, bisoprolol, carvedilol); coronary angina: beta-blockers (metoprolol, bisoprolol); tachycardia: beta-blockers (propranolol, metoprolol), or verapamil; avoid dihydropyridines (dipine); bradycardia: dihydropyridines (amlodipine, nifedipine extended-release tablets); avoid beta-blockers; nocturnal angina: dihydropyridines (nifedipine extended-release tablets); glucose and lipid metabolism disorders: dihydropyridines (amlodipine, nifedipine extended-release tablets or controlled-release tablets); use beta-blockers and thiazide diuretics with caution, and if used, at low doses.

Management and follow-up. Most patients need to attend follow-up appointments on time to adjust medication or dosage promptly until the target blood pressure level is achieved. At least once a week is recommended during the initial stages of treatment or when blood pressure is unstable. Patients with the means should have their own blood pressure monitor and measure their blood pressure at least three times a day (morning, noon, and evening) until the blood pressure is lowered to the target and stabilizes. Self-monitoring of blood pressure is extremely beneficial for assessing blood pressure levels and severity, evaluating treatment effectiveness, improving adherence, and enhancing overall treatment efficacy. It is also an important reference for evaluating blood pressure levels and guiding antihypertensive treatment.

Hypertensive Crisis. What is a hypertensive crisis? A hypertensive crisis includes hypertensive emergencies and hypertensive urgency. A hypertensive emergency is characterized by severely elevated blood pressure (BP > 180/120 mmHg) accompanied by progressive target organ (heart, brain, etc.) dysfunction. Hypertensive emergencies require immediate antihypertensive treatment to prevent further damage to target organs. Hypertensive emergencies include hypertensive encephalopathy, intracranial hemorrhage, acute myocardial infarction, acute left ventricular failure with pulmonary edema, unstable angina, and aortic dissection aneurysm. A hypertensive urgency is characterized by severely elevated blood pressure without target organ damage.

Treatment Guidelines:

Immediate Medical Attention: If necessary, transfer to the intensive care unit, ensure bed rest and quiet, administer oxygen if necessary, and use sedatives (not for cerebrovascular accidents). Establish intravenous access and monitor blood pressure, heart rate, and respiration.

How Much Blood Pressure Should Be Lowered: Administer appropriate antihypertensive medication as soon as possible. Intravenous infusion is preferred, aiming for a rapid decrease in mean arterial blood pressure within one hour, but not exceeding 25% of the highest blood pressure value. Blood pressure should then be lowered to 160/100-110 mmHg over the next 2-6 hours. Excessive blood pressure reduction can cause renal, cerebral, or coronary ischemia. Once blood pressure reaches a tolerable level, if the clinical condition is stable, gradually lower blood pressure to normal levels over the next 24-48 hours. Special attention is required in the following situations: Acute stroke (hemorrhagic or ischemic) – Current guidelines recommend against overly aggressive blood pressure reduction. Aortic dissection aneurysm: Systolic blood pressure should be rapidly reduced to approximately 100 mmHg (if tolerated).