[Changes in noninvasive cardiovascular parameters by inpatient weight reduction].

Area of Science:

• Cardiology
• Metabolic Disorders
• Nutritional Science

Context:

• Obesity is a significant risk factor for hypertension and cardiovascular disease.
• Dietary interventions are crucial for managing obesity and its associated health risks.
• Understanding the impact of calorie restriction on cardiac function is essential for clinical practice.

Purpose:

• To investigate the effects of a 4-week, 800 kcal/day isocaloric reduction diet on blood pressure and cardiac performance in obese individuals.
• To compare the effects of the diet in hypertensive obese versus normotensive obese individuals.
• To determine if weight loss percentage influences the observed changes.

Summary:

• A 4-week clinical study involving 36 normotensive obese and 23 hypertensive obese individuals utilized an 800 kcal/day diet.
• Non-invasive techniques, including systolic time intervals (STI), were used to assess blood pressure and cardiac function.
• Significant reductions were observed in systolic and diastolic blood pressure, myocardial oxygen consumption, cardiac output, and various systolic time intervals (e.g., left ventricular ejection time, total electromechanical systole).
• Heart rate, preejection index, and stroke volume remained unchanged.
• Obese normotensive individuals with less than 5% weight reduction did not show significant improvements in these parameters.

Impact:

• This study demonstrates that a short-term, calorie-restricted diet can effectively improve cardiovascular parameters in obese individuals, including those with hypertension.
• The findings highlight the importance of achieving a significant percentage of weight loss for cardiovascular benefits.
• Results provide valuable insights for developing targeted dietary strategies for obesity and hypertension management.