i am 62 yrs, with controlled hypertension, with mild mitral valve prolapse. Last night, after a light dinner, i felt a sudden thump in my chest followed by a slight blurring of vision and my temples felt as thought they were going to burst. I said to myself, am i having a stroke? I took my night medication of inderal 10mg and took lexotan 1.5mg to calm me down. My blood pressure was 140/90. Why caused the sudden thump in my chest and the rest. Thank you