Conn’s Syndrome
Introduction
Conn’s syndrome, also known as primary hyperaldosteronism, is fairly rare condition that is caused by an overproduction of the aldosterone hormone within the body. This specific hormone plays a role in many physiological systems throughout the body, but its main function is to regulate salt and water. Aldosterone is the final part of electrolyte and water absorption within the nephron before excretion in the urine. Elevated levels of aldosterone results in a reduction of plasma potassium and retention of sodium. This ultimately causes an increase in blood volume within the vasculature, thus increasing blood pressure.
Primary hyperaldosteronism is the most common cause of secondary hypertension and occurs in about 6% to 20% of adult hypertensive patients. It is even more prevalent in patients with resistant hypertension. The etiology of Conn’s syndrome may be idiopathic or secondary to adrenal hyperplasia, adrenal adenoma, aldosterone-secreting adrenal carcinoma, or familial hyperaldosteronism. There have been various genetic alterations that have been linked to familial forms of the disease, including abnormalities in CYP11B2 and CYP11B1 genes, chromosome 7p22, and mutations in the KCNJ5, G151E, and G151R genes. Other genes that have been related to the condition include ATP1A, ATP2B3, CACNAID, and NR3C2. Most of these alterations result in calcium influx and membrane depolarization resulting in aldosterone hypersecretion.1
Clinical Presentation
Most patients with Conn’s syndrome often present with having higher than normal blood pressure. Other symptoms that a patient with this disorder might have are related to the abnormal electrolyte levels within the blood due to excessive aldosterone. These symptoms include lack of muscle strength, headache, increased thirst, numbing feeling in the extremities, muscle cramps, eyesight issues, palpitations, and frequent urinary voiding.4
The complications related to this disorder are mainly cardiovascular related. This is due to patients having greater stress and pressure on the left ventricle, as well as decreased left ventricular function when compared to individuals without the disease. The most severe complications that arise from Conn’s syndrome are stroke, atrial fibrillation, and myocardial infarction. Other risks that this disease places on the patient include renal dysfunction and metabolic syndrome. Although some patients with primary aldosteronism may be absent from the above complications or symptoms, primary hyperaldosteronism can put great stress on an individual and can be extremely problematic in certain disease states. For example, if a patient already has hypertension, this condition may make it even more difficult to treat. Also, in patients with heart failure, the excessive aldosterone can place significant morbidity and possible mortality on the patient; elevated aldosterone levels can increase bodily fluid, which can cause a great amount of symptom burden in this patient population. It is important to identify the condition as soon as possible in order to reduce morbidity and mortality of the affected patient.1,2,4
Diagnosis
The Endocrine Society recommends the screening of patients for primary hyperaldosteronism in the following patient populations: Patients with hypertension on triple-drug therapy and diuretic-induced hypokalemia; patients with hypertension and adrenal incidentaloma; hypertension with a family history of the early-onset cerebral vascular accident; or patients with hypertension and first-degree relatives with confirmed primary hyperaldosteronism. This is mainly due to the fact that an excessive amount of aldosterone has the possibility of playing an important role of the listed disease states.1,2
Besides the patient populations mentioned above, one should suspect Conn’s syndrome if a patient presents with hypertension at an early age with hypokalemia and poorly controlled blood pressure with adequate medical treatment. After suspicion is made, the next step is to obtain a morning plasma aldosterone and renin ratio. If the ratio is higher than 20:1, then an excess of aldosterone can be attributed to the adrenal gland as the primary source. After the ratio has been determined, a provider may use any of the four following tests to confirm diagnosis (usually use at least two): oral sodium loading, saline infusion, fludrocortisone suppression, captopril challenge. All of these confirmatory tests should suppress aldosterone, however, in a patient with Conn’s syndrome, there will be a lack of aldosterone suppression. A CT scan is then undertaken in order to confirm that an adrenocortical carcinoma is not present. Adrenal venous sampling is then recommended.1,2
Treatment
The treatment for primary hyperaldosteronism includes laparoscopic resection to repair adenomas on the adrenal gland. This procedure usually resolves the associated hypokalemia, but hypertension still remains in up to 65% of patients’ post-surgery. In patients with bilateral hyperplasia, the treatment usually consists of diuretics, which help manage fluid buildup in the body. Idiopathic or secondary hyperaldosteronism is often treated with mineralocorticoid antagonists, such as spironolactone or eplerenone. Other potassium-sparing diuretics like amiloride can also be used. Conn’s syndrome is related to adrenal inefficiency & if you take proper supplement for adrenal then it will be recovered successfully. To learn more about adrenal & cortisol supplement, kindly visit this link: natural approaches to adrenal & cortisol health
References
1. Cobb A, Aeddula NR. Primary Hyperaldosteronism. [Updated 2020 May 30]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2020 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK539779/
2. Parmar MS, Singh S. Conn Syndrome. [Updated 2019 Jul 29]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2020 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK459197/
3. Schirpenbach C, Segmiller F, Diederich S, et al. The diagnosis and treatment of primary hyperaldosteronism in Germany: results on 555 patients from the German Conn Registry. Dtsch Arztebl Int. 2009;106(18):305‐311. doi:10.3238/arztebl.2009.0305
4. What is Conn's Syndrome? Conn's Syndrome: Symptoms, Diagnosis & Treatment - Urology Care Foundation. https://www.urologyhealth.org/urologic-conditions/conns-syndrome#:~:text=Conn's syndrome is a rare,leads to high blood pressure. Accessed June 12, 2020.
SEE ALSO
Addison’s Disease
Cushing’s Syndrome















