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Paroxysmal supraventricular tachycardia (PSVT) is a type of supraventricular tachycardia, named for its intermittent episodes of abrupt onset and termination. [3] [6] Often people have no symptoms. [1] Otherwise symptoms may include palpitations, feeling lightheaded, sweating, shortness of breath, and chest pain. [2] The cause is not known. [3]
However, if the abnormal heart rhythm continues, it can degenerate into a more dangerous arrhythmia known as ventricular fibrillation causing a cardiac arrest and, if untreated, sudden death. [10] There are typically very few abnormal signs on clinical examination in persons with CPVT.
The upper threshold of a normal human resting heart rate is based on age. Cutoff values for tachycardia in different age groups are fairly well standardized; typical cutoffs are listed below: [7] [8] 1–2 days: Tachycardia >159 beats per minute (bpm) 3–6 days: Tachycardia >166 bpm; 1–3 weeks: Tachycardia >182 bpm; 1–2 months: Tachycardia ...
In an age where convenience often trumps nutritional value, a growing body of research is raising concerns about the health implications of eating ultra-processed foods.These foods undergo ...
Summer 2017 has already been declared an especially bad season for ticks due to the mild winter and growing deer and mice populations.. Amid mounting fears over the potentially deadly diseases the ...
Fire ants also sting humans, Frye says, which can cause small pus-filled bumps on the skin, according to the Cleveland Clinic. Other symptoms: Ant bites are typically painful and itchy.
Wolff–Parkinson–White syndrome (WPWS) is a disorder due to a specific type of problem with the electrical system of the heart involving an accessory pathway able to conduct electrical current between the atria and the ventricles, thus bypassing the atrioventricular node.
New-world tarantulas—those indigenous to the Americas—have bites that generally pose little threat to humans (other than causing localized pain). The primary defense deployed by these spiders is by means of urticating hairs, which can cause irritant symptoms in humans. Cobalt blue tarantula (Haplopelma lividum), an old-world species