Low Blood Pressure: Causes and Symptoms Explained - Cardiology

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Understanding low blood pressure (hypotension) is crucial, especially when it presents with symptoms such as dizziness, fatigue, and nausea, as you've described. Your blood pressure readings of approximately 90 systolic and 60 diastolic indicate that you are experiencing low blood pressure, which can indeed lead to the symptoms you are experiencing.
Low blood pressure can be caused by a variety of factors, and it’s essential to consider both physiological and lifestyle-related causes. Here are some potential reasons for your low blood pressure and symptoms:
1. Dietary Factors: You mentioned that you might be consuming too few carbohydrates. Carbohydrates are a primary source of energy for the body, and inadequate intake can lead to low energy levels and fatigue. Additionally, a low-carb diet can sometimes lead to dehydration, especially if fluid intake is not increased accordingly. This dehydration can further contribute to low blood pressure.

2. Weight Loss: If you are actively trying to lose weight, it’s important to ensure that you are doing so in a healthy manner. Rapid weight loss or extreme dieting can lead to nutrient deficiencies, which can affect your overall health and blood pressure regulation. It’s crucial to maintain a balanced diet that supports your body’s needs.

3. Thyroid Function: Your thyroid levels indicate that you may have subclinical hypothyroidism (with a TSH of 0.718 and Free T4 of 1.08). The thyroid gland plays a significant role in regulating metabolism and energy levels. An underactive thyroid can lead to symptoms such as fatigue, weight gain, and low blood pressure. It’s advisable to discuss your thyroid function with your healthcare provider, as they may recommend further evaluation or treatment.

4. Anxiety: You mentioned having anxiety, which can manifest in various physical symptoms, including dizziness and a feeling of being unwell. Anxiety can also affect your heart rate and blood pressure, sometimes leading to fluctuations that may be misinterpreted as low blood pressure. It’s essential to address anxiety through appropriate therapeutic measures, which may include counseling or medication.

5. Postprandial Hypotension: The nausea you experience after meals could be related to postprandial hypotension, a condition where blood pressure drops significantly after eating. This occurs because blood flow is redirected to the digestive system, which can lead to dizziness and weakness.

6. Autonomic Dysfunction: The symptoms you describe, including dizziness and ear ringing, may also suggest issues with your autonomic nervous system, which regulates blood pressure and heart rate. Conditions like orthostatic hypotension, where blood pressure drops upon standing, could be a factor, especially if you experience symptoms when changing positions.

Given your symptoms and the complexity of potential causes, it is advisable to consult with a healthcare provider who can perform a thorough evaluation. This may include blood tests to check for anemia, electrolyte imbalances, and thyroid function, as well as a review of your dietary habits and lifestyle.
In the meantime, consider the following strategies to help manage your symptoms:
- Stay Hydrated: Ensure you are drinking enough fluids throughout the day, especially if you are increasing your physical activity.

- Balanced Diet: Focus on a well-rounded diet that includes adequate carbohydrates, proteins, and healthy fats. Consider consulting a nutritionist for personalized advice.

- Monitor Blood Pressure: Keep track of your blood pressure readings at different times of the day and under various conditions (e.g., after meals, when standing up) to provide your doctor with comprehensive information.

- Manage Anxiety: Engage in relaxation techniques such as deep breathing, meditation, or yoga to help manage anxiety symptoms.

In summary, low blood pressure can stem from various causes, including dietary habits, weight loss, thyroid function, and anxiety. A comprehensive evaluation by a healthcare professional is essential to determine the underlying cause and appropriate management strategies.