Bradycardia

AIDS

AIDS (Acquired Immunodeficiency Syndrome) is the final, most severe stage of HIV infection, characterized by a profoundly compromised immune system that makes individuals highly susceptible to opportunistic infections and certain cancers. It is diagnosed when the CD4+ T-cell count drops below 200 cells/mm³ or when specific AIDS-defining opportunistic illnesses develop. The cornerstone of AIDS treatment is highly active antiretroviral therapy (HAART), a combination of drugs that suppress HIV replication, preserve immune function, and prevent further progression. HAART significantly reduces viral load, increases CD4+ T-cell counts, and improves overall health. Treatment also includes prophylactic antibiotics to prevent opportunistic infections and specific therapies for any active infections or cancers. Symptoms of AIDS are primarily due to the opportunistic infections and cancers that take advantage of the severely weakened immune system. Common manifestations include persistent fever, chronic diarrhea, significant unintentional weight loss, night sweats, fatigue, swollen lymph nodes, and recurrent severe infections like Pneumocystis pneumonia, Kaposi's sarcoma, and toxoplasmosis. Neurological complications such as AIDS dementia complex can also occur.

Chronic Hepatitis C Virus infection

Chronic Hepatitis C Virus (HCV) infection is a persistent inflammatory condition of the liver caused by the hepatitis C virus, defined by the presence of detectable HCV RNA for at least six months. This long-term infection can progressively lead to significant liver damage, including fibrosis, cirrhosis, and hepatocellular carcinoma. Current treatment primarily involves direct-acting antiviral (DAA) medications, which are highly effective oral regimens targeting specific viral proteins to inhibit HCV replication. These therapies typically achieve a sustained virologic response (SVR) in over 95% of patients, effectively curing the infection. Treatment duration usually ranges from 8 to 12 weeks, depending on the specific regimen and patient factors. Chronic HCV infection is often asymptomatic for many years, leading to a silent progression of liver disease. When symptoms do appear, they are often non-specific, such as fatigue, malaise, nausea, and right upper quadrant discomfort. As the disease advances to cirrhosis, signs of liver decompensation may emerge, including jaundice, ascites, peripheral edema, spider angiomata, and hepatic encephalopathy.

Chronic hypertension

Chronic hypertension is a persistent and sustained elevation of blood pressure, typically defined as a systolic blood pressure greater than or equal to 130 mmHg or a diastolic blood pressure greater than or equal to 80 mmHg on multiple occasions. It is a major modifiable risk factor for various cardiovascular diseases, stroke, and kidney disease. Treatment for chronic hypertension involves a multi-faceted approach, starting with lifestyle modifications such as dietary changes (e.g., DASH diet), regular physical activity, weight loss, and reduced sodium and alcohol intake. Pharmacological therapy is often necessary and may include various classes of antihypertensive medications like diuretics, ACE inhibitors, angiotensin receptor blockers (ARBs), beta-blockers, and calcium channel blockers, frequently used in combination to achieve target blood pressure. Chronic hypertension is often referred to as 'the silent killer' because it is frequently asymptomatic for many years, even at high levels. When symptoms do occur, they are typically non-specific and may include headaches, dizziness, nosebleeds, or shortness of breath, usually manifesting in severe or long-standing cases or during a hypertensive crisis. Most diagnoses are made during routine medical screenings.