Determine whether a backsearch should be performed on prior peaks

def _require_backsearch(self):
        """
        Determine whether a backsearch should be performed on prior peaks
        """
        if self.peak_num == self.n_peaks_i-1:
            # If we just return false, we may miss a chance to backsearch.
            # Update this?
            return False

        next_peak_ind = self.peak_inds_i[self.peak_num + 1]

        if next_peak_ind-self.last_qrs_ind > self.rr_recent*1.66:
            return True
        else:
            return False