How does excessive stimulation affect the nervous system?

Feb 24, 2022 ... Caffeine, cigarettes and high levels of alcohol may cause an increased heart rate after you use those substances. Additionally, illegal drugs ... Feb 24, 2023 ... A child may notice that their heart is beating fast if they are nervous or scared, they have a fever, they have had too much caffeine, they have ... Aug 30, 2023 ... Symptoms of Arrhythmia ... You may be able to notice if your heartbeat seems irregular. Some common symptoms include a rapid heart rate, blurred ... Sep 24, 2024 ... Causes of ventricular tachycardia · Lack of coronary artery blood flow, depriving oxygen to heart tissue · Cardiomyopathy distorting the heart's ... Inappropriate sinus tachycardia (IST) occurs when the heart beats very quickly without a good reason. It is a type of heart rhythm abnormality called an ... Apr 9, 2024 ... However, some palpitations are due to an abnormal heart rhythm, which may be caused by: ... Does your heart rate feel slow or fast when you have ... May 15, 2024 ... If symptoms do occur (WPW syndrome), they are related to the development of an abnormal heart rhythm and a rapid heart rate. During tachycardia, ... A heart problem or other medical conditions may sometimes cause a fast heart rate. A fast heart rate may cause palpitations, chest pain or pressure ... Feb 13, 2025 ... ... symptom of POTS is a fast heartbeat ... increased heart rate, fainting spells or dizziness that occur in an upright position. Jun 14, 2019 ... There are times that having an elevated heart rate makes sense. For instance, if you are fighting a fever or getting over the flu, or are in the ...