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What are blood clots?

Medically reviewed by Maushmi Sheth
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Medically reviewed by Maushmi Sheth

One of the most dangerous comorbidities affecting people who have cardiovascular diseases is clots. Clots are made of blood that has coagulated in vessels for some reason. It could be a natural reaction for a cut, but some diseases could also cause them. Clots’ main work is to stop bleeding if a human is injured. This mechanism is necessary to protect the person from severe blood loss; otherwise, the person would die even from a small cut.

Blood clots formed for natural reasons can dissolve on their own over time, but sometimes this does not happen. When a clot forms in a vessel, it can be very dangerous because a large thrombus can clog the vessel in which it is located. Blood circulation is impaired in the area where there is a blood clot

Also, a part of large blood clots can break off, circulate through the blood, and pose a significant danger to the patient’s life because it can clog the vessels in the vital organs, lungs, or brain. If it gets into the coronary vessels, brain vessels, or pulmonary artery, you must immediately call an ambulance. 

Arterial and Vein clots

There are two types of vessels in the human body, through which blood circulates throughout the body. Blood clots form in both of them, but the symptoms and course of the disease will vary greatly.

If a blood clot forms in an artery, it is considered arterial. The peculiarity of arterial thrombi is that they cause different complications immediately; this is because the blood circulates faster in the arteries and must deliver oxygen to the cells- without oxygen, the cells begin to die. That is why, in case of symptoms of an arterial thrombus, it is necessary to call an ambulance. 

Typical symptoms are : 

  • Sharp chest pain
  • Loss of sensation in the limbs
  • Paresis or paralysis of various parts of the body
  • Dyspnea

Thrombi could also form in veins. This type of thrombi develops slower than the previous type, and symptoms often develop gradually, but they are still very life-threatening. Veins can be either deep or surface. Thrombi occur in both. 

Deep vein thrombi

Deep vein thrombi

This type is caused by a variety of diseases of the cardiovascular system. It often damages the large deep veins in the limbs, arms, and legs. Although in some cases it can damage other deep veins, in rare cases, blood clots form in the vessels of the brain.

Pulmonary vascular thrombosis has the highest mortality rate. More than a hundred thousand people a year die from this complication. 

Until complications and vivid symptoms occur, a person may not even be aware of his or her disease. To reduce the risk of the disease, patients should see a specialist regularly. It is also helpful to know the main symptoms of the disease; so that the person is aware of them. Knowing these symptoms will enable you to seek help in good time and avoid complications. 

Sometimes the disease can be asymptomatic, and the patient will not feel any discomfort, but in most cases, the disease has characteristic symptoms. The early symptoms of the disease may also be confused with symptoms of other conditions, so you should consult your doctor if you notice them. Depending on the location of the clot, the symptoms will vary.

Thromboses in the limbs.

In most cases, thrombi develop in the extremities because blood flow in these areas is slow. 

The characteristic symptoms will be:

  • Swelling – the limb will be enlarged; this is particularly noticeable if the clot is in the lower extremities.
  • Pain – there may be pain in the limb for no apparent reason. Pain is usually caused by exertion.
  • Numbness – there may be a loss of sensation in the thrombosed area and an impaired sensitivity to temperature and pain.
  • Pallor – the skin of the affected limb may differ in color from healthy areas, including redness or cyanosis.

The number of symptoms and their severity depends on the size of the thrombus. A small clot may not cause any discomfort at all, but a large clot may cause several symptoms at once. In most cases, the clot affects only one limb, either the right or the left. 

Сoronary thrombosis

Сoronary thrombosis

If a blood clot clogs one of the vessels that feed the myocardium, the heart muscle begins to die off in that area; this then leads to a heart attack. The mortality rate for this complication is high, but the patient can be saved if treated in time. Typical symptoms include:

  • Chest tightness
  • Pain in the heart area
  • Breath disorders
  • Tachycardia

It’s better to call an ambulance if you have one of them. 

Blood clots in the brain

One of the most dangerous places for blood clots to reach is the brain. Blood clots in the brain can cause different symptoms depending on their location:  

  • Headache
  • Impaired vision, hearing, speech
  • Respiratory problems
  • Mobility problems

A blood clot may cause all these symptoms if there is a blockage in a cerebral vessel. 

Pulmonary embolism

If thrombi block one of the lung’s vessels, patients have little time to call for emergency help. If there is a complete blockage, death occurs within minutes. The characteristic symptoms are:

  • Pale skin or cyanosis
  • High pulse rate
  • Respiratory disorders
  • Cough with bloody discharge
  • Pain in chest 
  • Shortness of breath at rest 

What influences blood clots, and how to avoid their development?

Lifestyle and heredity have the biggest influence on the development of blood clots. 


Having an unhealthy lifestyle heightens a person’s risk of having different diseases. This kind of lifestyle contributes to blood clots, and avoiding them can help you stay healthy. These include:

  • Smoking
  • Alcohol use
  • Lack of regular exercise
  • Overcooling
  • Unbalanced diet
  • Comorbidities 
  • Taking certain medications

All of these factors dramatically increase your chances of getting sick.


If a person is prone to developing blood clots, they should see a doctor regularly to prevent the disease from developing.

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Edward Medina
Edward Medina
15:34 30 Jun 22
Just such an amazing staff that makes you feel like part of their family. I’ve been going there for over 5 years now... and each visit I get the very best care and treatments that I have ever received in the 20+ years that I’ve been dealing with severe debilitating migraines. Since i started seeing them the number of my migraines has dropped from 15-20 a month to 2-3 every 3 month. I highly recommend them …they will change your life!read more
Daneisha Johnson
Daneisha Johnson
22:20 19 May 22
Dr. Askari was very kind and explained everything so I could understand. The other staff were nice as well. I would... have gave 5 stars but I was a little taken aback when I checked in and had to pay 600.00 upfront. I think that should have been discussed in a appointment confirmation call or email just so I could have been more
Jean Cooper
Jean Cooper
16:54 29 Apr 22
I love the office staff they are friendly and very helpful. Dr. JODIE is very caring and understanding to your needs... and wants to help you. I will go back. would recommend Dr. Dr. Jodie to other Patients in a heart beat. The team works well more
Linda M
Linda M
19:40 02 Apr 22
I was obviously stressed, needing to see a neurologist. The staff was so patient and Dr. Ansari was so kind. At one... point he told me to relax, we have time, when I was relaying my history of my condition. That helped ease my stress. I have seen 3 other neurologists and he was the only one who performed any assessment tests on my cognitive and physical skills. At one point I couldn't complete two assessments and got upset and cried. I was told, it's OK. That's why you're here. I was truly impressed, and super pleased with the whole experience!read more
Leslie Durham
Leslie Durham
15:05 01 Apr 22
I've been coming here for about 5 years. The staff are ALWAYS friendly and knowledgeable. The Doctors are the absolute... best!! Jodie Moore is always in such a great mood which is a plus when you are already stressed. Highly recommendedread more
Monica Del Bosque
Monica Del Bosque
14:13 25 Mar 22
Since my first post my thoughts have changed here. It's unfortunate. My doctor and PA were great, but the office staff... is horrible. They never call you back when they say they will, they misinform you, they cause you too much stress wondering what's going on, they don't keep you posted. They never answer the phone. At this point I've left four messages in the last week, and I have sent three messages. Twice from their portal and one direct email. No response. My appointment is on Monday morning at 8:30am, no confirmation on my insurance and what's going on. What the heck is going on, this is ridiculous!I've given up... the stress her office staff has put me through is just not worth it. You can do so much better, please clean house, either change out your office staff, or find a way for them to be more efficient please. You have to do something. This is not how you want to run your practice. It leaves a very bad impression on your more
Ron Buckholz
Ron Buckholz
23:32 23 Mar 22
I was actually pleasantly surprised with this visit! It took me a long time to get the appointment scheduled because no... one answers your phones EVER! After a month, I finally got in, and your staff was warm, friendly, and I was totally impressed! I feel like you will take care of my needs!read more
Steve Nabavi
Steve Nabavi
16:28 16 Mar 22
It was a nice visit. Happy staff doing all they can do to comfort the patients in a very calming environment. You ask... me they are earned a big gold star on the fridge. My only complaint they didn't give me any more
Katie Lewis
Katie Lewis
16:10 10 Feb 22
Had very positive appointments with Jodie and Dr. Sheth for my migraine care. Jodie was so fast with the injections and... has so much valuable info. I started to feel light headed during checkout and the staff was SO helpful—giving me a chair, water, and taking me into a private room until I felt better. Highly recommend this practice for migraine patients, they know what they’re doing!!read more
Joshua Martinez
Joshua Martinez
16:02 10 Dec 21
I was scheduled to be checked and just want to say that the staff was fantastic. They were kind and helpful. I was... asked many questions related to what was going on and not once did I feel as though I was being brushed off. The front desk staff was especially great in assisting me. I'm scheduled to go back for a mri and am glad that I'll be going more
Isabel Ivy
Isabel Ivy
21:42 03 Nov 21
I had such a good experience with Lone Star Neurology, Brent my MRI Tech was so awesome and made sure I was very... comfortable during the appointment. He gave me ear plugs, a pillow, leg support and blanket, easiest MRI ever lol 🤣 My 72 hour EEG nurse Amanda was also so awesome. She made sure I was take care of over the 3 days and took her time with the electrodes to make sure it was comfortable for me! Paige was also a huge help in answering all my questions when it came to my test results, and letting me know her honest opinions about how I should go forth with my more
Leslie Luce
Leslie Luce
17:37 20 Oct 21
The professionalism and want to help attitude of this office was present from the moment I contacted them. The follow... up and follow through as well as their willingness to find a way to schedule my dad was above and beyond. We visited two offices in the same day with the same experience. I am appreciative of this—we spend a lot of time with doctors and this was top notch start to more
robert Parker
robert Parker
16:38 16 Apr 21
I love going to this office. The staff is friendly and helpful. The doctor is great. I am getting the best... neurological tests and treatment I have ever had. The only reason I did not give them a 5 star rating is because it is impossible to reach a live person at the office to reschedule appointments. Every time I have tried to get through to the office it says all people are busy and I am sent to a voicemail. If they could get their phone answering fixed, I would give them a strong 5 more
MaryAnn Hornbaker
MaryAnn Hornbaker
00:26 25 Feb 21
Dr. Harney is an excellent Dr. I found him friendly , personable and thorough. I evidently am an unusual case. ... Therefore he spent a Hugh amount of time educating me. He even gave me literature to further explain my condition and how to follow up. This is something you rarely get from your doctors. So I am more than please with my doctor and his more
Roger Arguello
Roger Arguello
03:05 29 Jan 21
Always courteous, professional. The staff is very friendly and always work with you to find the best appointment time.... The care team has been great. Always taking the time to listen to your concerns and to find the best more
Margaret Rowland
Margaret Rowland
01:12 27 Jan 21
I have been a patient at Lone Star Neurology for several years. Now both my adult daughters also are patients there. I... love Jodie. She is always so prompt whether it is a teleamed call are a visit in the office. She takes the time to explain everything to me and answers all my questions. I am so blessed to have Jodie as my more
Susan Miller
Susan Miller
03:01 13 Jan 21
My husband had an accident 5 years ago and Lone Star Neurology has been such a blessing to us with my husbands care.... Jodie Moore is his provider and she is amazing! Jodie is very knowledgeable, caring, and thorough. She takes her time with you, making sure your needs are met and she is happy to answer any questions you may have. Lone Star Neurology’s patients are very lucky to have Jodie providing their care. Thank you Lone Star Neurology and especially Jodie for everything you have done for us. Jodie, you are the best!read more
Windalyn C
Windalyn C
01:32 09 Jan 21
Jodie is wonderful. She is very caring and knowledgeable. I have been to over a dozen neurologists, and none were able... to help me as much as they have here. Thanks!read more
Katie Kordel
Katie Kordel
00:40 09 Jan 21
Jodi Moore, nurse practitioner, is amazing. I have suffered from frequent, debilitating headaches for almost 20 years.... She has provided the best proactive and responsive care I have ever received. My quality of life has been greatly improved by her caring approach and tenacity in finding more
Ellie Natsis
Ellie Natsis
15:41 07 Jan 21
I have had the best experience at this neurologist's office! For over a year I have been receiving iv treatments here... each month and my nurse, Bobbie is beyond wonderful!! She's so attentive, knowledgeable, caring, and detail oriented. She makes an otherwise uncomfortable experience much more pleasant and definitely puts me at ease! She also helps me with my insurance,ordering this specialty medication and dealing with the ordering process which is no easy feat.Needless to say, she goes above a beyond in every way and I'm so grateful to this office and to Bobbie for all they do for me!read more
Matt Morris
Matt Morris
15:39 07 Jan 21
Let me start by saying that I have been coming here for years. Due to my autoimmune disease, I am in this office... once every three weeks for multiple hours at a time. The office is very clean and the staff very friendly. My only complaint would be there communication via phone. They aren't the best at responding if you leave a voicemail and expect a call back. I understand that this is prob just due to the sheer number of alls they receive daily. What I can say I like the best about the office are the people. Bobby who handles my infusions is great. I never have any issues with her setting up my infusions. She is very quick to reply to messages sent via text and if she were to leave then my whole opinion of the office may change. I also enjoy people like Matt, Lauren, and Jodi. I appreciate all that they do for me and without this team I'm not sure I would be as happy as I am to visit the office as frequently as I have to. Please ensure that these folks are recognized as they are what makes my visit to this office so tolerable :).read more
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