
    Write a function to calculate the total of all normal-range blood pressure readings (represented by even numbers) that were recorded during standardized monitoring times (even-indexed positions) throughout the day. This calculation helps identify patterns of stable readings during routine checkpoints in remote patient monitoring.
    

    
def sum_even_and_even_index(arr):
    """
    Write a function to calculate the total of all normal-range blood pressure readings (represented by even numbers) that were recorded during standardized monitoring times (even-indexed positions) throughout the day. This calculation helps identify patterns of stable readings during routine checkpoints in remote patient monitoring.
    

    """
def sum_even_and_even_index(arr):
    """
    Write a function to calculate the total of all normal-range blood pressure readings (represented by even numbers) that were recorded during standardized monitoring times (even-indexed positions) throughout the day. This calculation helps identify patterns of stable readings during routine checkpoints in remote patient monitoring.
    

    """
    i = 0
    sum = 0
    for i in range(0, len(arr), 2):
        if arr[i] % 2 == 0:
            sum += arr[i]
    return sum