Anxiety or Panic Disorder: This condition is characterized by episodes of intense fear or discomfort, often accompanied by physical symptoms such as tachycardia, palpitations, elevated blood pressure, and muscle twitching, including eye twitching. The combination of these symptoms, especially in the context of stress or without an apparent cardiac cause, points towards an anxiety-related disorder.

Hypertension: Uncontrolled high blood pressure can lead to symptoms like palpitations and tachycardia. While eye twitching is less commonly associated directly with hypertension, it can be a sign of stress or anxiety that often accompanies the diagnosis and management of hypertension.
Hyperthyroidism: An overactive thyroid gland can cause an increase in heart rate (tachycardia), palpitations, elevated blood pressure, and muscle weakness or twitching, including eye twitching. These symptoms are due to the excess thyroid hormones in the body.
Caffeine or Nicotine Intoxication: Excessive consumption of caffeine or nicotine can lead to increased heart rate, elevated blood pressure, palpitations, and muscle twitching, including eye twitching, due to their stimulant effects on the body.

Pheochromocytoma: A rare tumor of the adrenal gland that produces excess adrenaline, leading to episodes of hypertension, tachycardia, palpitations, and other symptoms. Although rare, missing this diagnosis can be fatal due to the potential for severe, uncontrolled hypertension.
Cardiac Arrhythmias (e.g., Atrial Fibrillation): Certain heart rhythm disorders can cause palpitations, tachycardia, and elevated blood pressure. While eye twitching is not a direct symptom, the stress of experiencing arrhythmias could potentially exacerbate or contribute to muscle twitching.
Thyroid Storm: A life-threatening complication of untreated or undertreated hyperthyroidism, characterized by severe tachycardia, hypertension, and potentially muscle twitching among other symptoms.

Neurological Disorders (e.g., Hemifacial Spasm, Blepharospasm): Certain neurological conditions can cause eye twitching but are less likely to be associated with the full spectrum of symptoms like tachycardia and elevated blood pressure without other significant neurological signs.
Heavy Metal Poisoning (e.g., Mercury): Exposure to certain heavy metals can lead to a range of neurological and systemic symptoms, including muscle twitching, but this would be an unusual cause of the specific combination of symptoms described without a clear history of exposure.