As a medical professional with expertise in internal medicine, I can tell you that hyperkalemia, which is a condition where there is an abnormally high level of potassium in the blood, can indeed be life threatening. This is particularly true when the levels of potassium rise rapidly or reach very high levels, as it can lead to serious medical complications, including: 1. Cardiac arrhythmias: High potassium levels can disrupt the normal electrical activity of the heart, leading to an irregular heartbeat or even cardiac arrest. 2. Muscle weakness or paralysis: Excess potassium can interfere with the normal functioning of muscles, potentially leading to severe muscle weakness or even paralysis. 3. Electrolyte imbalances: Hyperkalemia can cause imbalances in other electrolytes, which are critical for maintaining normal body functions. The severity of hyperkalemia depends on the concentration of potassium in the blood and the presence of any underlying health conditions. Treatment typically involves steps to remove excess potassium from the body and to address the underlying cause of the elevated potassium levels. read more >>

Most potassium in the body (98%) is found within cells and organs. ... But if you have kidney disease, the most common cause of hyperkalemia, potassium levels can build up. Medications or diet may also affect the amount of potassium in the blood. Hyperkalemia can be life threatening and must be treated promptly.read more >>