This was not a smooth process. The rise of executive power sometimes hurt important interests and always rubbed against the republican sensibilities that Americans inherited from the founders. From time to time, Congress reaped political benefits from thwarting the president. But today Congress reacts rather than leads.
Heart problems. Some heart conditions that can lead to low blood pressure include extremely low heart rate (bradycardia), heart valve problems, heart attack and heart failure. These conditions may cause low blood pressure because they prevent your body from being able to circulate enough blood. 1  Endocrine problems.
It could be a neuro cause like in Cushing's Triad, (bradycardia, widening pulse pressure and irregular respirations). Or it could be a cardiac cause such as cardiac tamponade where you get a narrowing pulse pressure do to the impaired filling ability of the heart. narrow pulse pressure is also caused by aortic valve stenosis and cardiac tamponade. A pulse pressure is considered abnormally low if it is less than 25% of the systolic value.