Diastolic Function in Patient With AF

A 79-year-old male patient with a medical history of paroxysmal atrial fibrillation (AF), hypertension, and chronic kidney disease presents to the hospital after a mechanical fall resulting in a right intertrochanteric femur fracture. He undergoes right femur open reduction internal fixation surgery. After the successful operation, the patient experiences palpitations and is found to be in AF with rapid ventricular response. A transthoracic echocardiogram is performed while he is intermittently in AF.

Figure 1: Atrial Fibrillation Rhythm

Figure 1
(A) Mitral E maximum velocity (1.19 m/s). (B) Mitral E velocity peak acceleration rate (2,615 cm/s2). (C) Mitral valve DT (122 msec). (D) Tissue Doppler septal e' velocity (9 cm/s).

Figure 2: Sinus Bradycardia Rhythm

Figure 2
(A) Mitral E maximum velocity (1.06 m/s) and DT (242 msec). (B) Tissue Doppler septal e' velocity (7 cm/s). (C) Tissue Doppler lateral e' velocity (7.5 cm/s). (D) IVRT (96 msec).

Based on the information provided, what is the best description of the patient's diastolic function?

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