Peripheral vascular resistance and cardiac output are the two main determinants for the presentation of<unk> . autonomic nervous system impairment due to drugs or an autonomic failure, can lead to a decrease in peripheral vascular resistance. Reflex activity impairment may also cause a decrease of peripheral vascular resistance, as the body normal compensation reflexes fail. The decrease in cardiac output may be due to venous pooling, cardioinhibitory reflexes, arrhythmia, pulmonary embolism, and volume depletion leading to diminished venous return, among others.
Syncope causes
Headache causes
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Epilepsy causes
Aortitis causes
Chest pain causes
Diarrhea causes
Hemoptysis causes