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1. Postural Orthostatic Tachycardia Syndrome (POTS)
• This condition can cause an excessive increase in heart rate (tachycardia) upon standing or during physical activity, leading to dizziness, blurry vision, weakness, and shakiness.
2. Orthostatic Hypotension
• A sudden drop in blood pressure when moving from a seated or lying position to standing, which can lead to dizziness, weakness, and blurred vision. It could also contribute to the purplish discoloration of lower extremities.
3. Cardiovascular Issues
• Arrhythmias or other heart-related problems could cause elevated heart rates, dizziness, and the sensation of weakness or shaky hands.