Health conditions and diseases starting with S. Understand symptoms, causes, and treatment options to make informed health choices.
Citrobacter species, particularly Citrobacter freundii, are opportunistic pathogens that can cause meningitis in both immunocompromised individuals and those with other predisposing conditions such as trauma, neurosurgery, or underlying chronic diseases. Although less common than other causative agents of bacterial meningitis, Citrobacter meningitis presents a significant clinical challenge due to its potential for antibiotic resistance and
Bacterial meningitis is a severe and life-threatening infection of the membranes surrounding the brain and spinal cord. It can be caused by a variety of bacteria, including Neisseria meningitidis, Streptococcus pneumoniae, and Haemophilus influenzae. Left untreated, bacterial meningitis can lead to severe neurological damage, long-term disabilities, and even death. Therefore, early diagnosis and prompt, effective
Syncope due to heart block refers to fainting episodes or loss of consciousness that occur when the heart’s electrical conduction system is impaired. Heart block, or atrioventricular (AV) block, disrupts the normal electrical impulses between the atria and ventricles, causing a delay or complete blockage in the transmission of signals that control the heartbeat. This
Symptomatic orthostatic hypotension (OH) is a clinically significant drop in blood pressure upon standing, accompanied by symptoms such as dizziness, lightheadedness, visual disturbances, fatigue, or even syncope. The condition is defined by a sustained reduction of at least 20 mmHg in systolic or 10 mmHg in diastolic pressure within three minutes of standing or head-up
Symptomatic congenital syphilis is a severe transplacental infection caused by Treponema pallidum, a spirochete bacterium transmitted from an infected mother to her fetus. It remains a significant public health concern, especially in areas with inadequate prenatal screening and treatment access. The disease manifests with a wide range of clinical symptoms that may present at birth
The deliberate or accidental release of high-potency opioids as chemical weapons presents a severe public health and national security threat. Synthetic opioids, such as fentanyl and its analogs, are significantly more potent than morphine, with lethal effects manifesting in microgram quantities. The risk is amplified in enclosed environments or mass exposure events, necessitating rapid identification,
Surgical procedures on the eye proper refer to interventions involving the ocular globe and its internal structures. These highly specialized operations aim to restore, preserve, or enhance vision by addressing pathological conditions that cannot be treated with pharmacological or non-invasive therapies. Common procedures include cataract extraction, glaucoma filtration surgery, vitrectomy, corneal transplantation, and retinal reattachment,
Effective hemostasis is critical to the success of surgical procedures, directly influencing patient outcomes and operative efficiency. While conventional methods such as ligation, cautery, and suturing remain foundational, surgical hemostasis adjuncts play a vital role in controlling bleeding—particularly in complex, minimally accessible, or highly vascularized areas. These adjuncts encompass a range of biologically and synthetically
Supraventricular tachycardia (SVT) encompasses a group of arrhythmias characterized by an abnormally rapid heart rate originating above the ventricles. This condition can cause significant discomfort and functional impairment, particularly when episodes occur frequently or persist for extended periods. SVT is often paroxysmal, meaning it begins and ends abruptly. Types of Supraventricular Tachycardia SVT is a
Supraventricular arrhythmias refer to abnormal heart rhythms that originate above the ventricles, specifically in the atria or the atrioventricular (AV) node. These arrhythmias range from benign palpitations to life-altering rhythm disturbances that increase the risk of stroke, heart failure, and other complications. A thorough understanding of their classification, mechanisms, and therapeutic strategies is essential for