A slow heart rate is called bradycardia. Some irregular heartbeats are normal: 1  Sinus arrhythmia is the normal variation in heart rate that accompanies breathing in and out.  Sinus tachycardia is the normal increase in the heart rate that occurs in healthy people when they are excited, exercising, or have a fever.
There are four tabby patterns that have been shown to be genetically distinct: Mackerel, Classic, spotted, and ticked. A fifth includes tabby as part of another basic color pattern. The patched tabby is a calico or tortoiseshell cat with tabby patches (also known as caliby and torbie, respectively).All those patterns have been observed in random-bred populations. Several additional patterns are found in specific breeds.A modified Classic tabby is found in the Sokoke breed.he patched tabby is a calico or tortoiseshell cat with tabby patches (also known as caliby and torbie, respectively). All those patterns have been observed in random-bred populations. Several additional patterns are found in specific breeds. A modified Classic tabby is found in the Sokoke breed.
Not so; the tabby is a color pattern-most often stripes, but sometimes stripes and whorls, or even spots and stripes. The tabby pattern is so popular that it can be found in many pedigreed cats today, and is accepted in a number of breeds by the most popular registries.